Export Control
EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.Copyright
© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).Applicability
V2500-A1
Common Information
TASK 72-00-45-420-001-A01 HPT Assembly - Install The HPT Assembly (Horizontal) - Method 1, Installation-001
General
Fig/item numbers in parentheses in the procedure agree with those used in the IPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the IPC.
For all parts identified in a different Chapter/Section/Subject, the applicable Chapter/Section/Subject comes before the Fig/item number.
For standard torque data and procedures, refer to SPM TASK 70-41-00-400-501 and SPM TASK 70-41-02-400-501.
Special torque data and assembly tolerances are included in this procedure.
Lubricate all threads and abutment faces of nuts and bolts with CoMat 10-077 APPROVED ENGINE OILS, unless other lubricants are referred to in the procedure.
To identify, lubricate and install seal rings, refer to SPM TASK 70-44-01-400-501.
The number for each radial location must be identified in a clockwise direction. Use CoMat 06-153 FELT TIP MARKER, RAPID DRYING, CoMat 06-153 FELT TIP MARKER, RAPID DRYINGX or CoMat 06-158 MARKER, EXTRA FINE POINT(BLACK). These start at the engine top position when you look from the rear of the engine, unless stated differently in the procedure. Refer to SPM TASK 70-09-00-400-501.
Transportation covers/blanks must be removed immediately before the installation of the components.
NOTE
NOTE
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| IAE 1F10015 Hydraulic wrench | 0AM53 | IAE 1F10015 | 1 | (alternative to IAE 1F10016) |
| IAE 1F10016 Mechanical wrench | 0AM53 | IAE 1F10016 | 1 | (alternative to IAE 1F10015) |
| IAE 1F10026 Hydraulic hand pump | 0AM53 | IAE 1F10026 | 1 | |
| IAE 1F10052 Two cables sling | 0AM53 | IAE 1F10052 | 1 | |
| IAE 1P16011 Wrench | 0AM53 | IAE 1P16011 | 1 | |
| IAE 1P16040 Heater | 0AM53 | IAE 1P16040 | 1 | |
| IAE 1P16046 Removal/Installation fixture | 0AM53 | IAE 1P16046 | 1 | |
| IAE 1P16047 Hydraulic adapter | 0AM53 | IAE 1P16047 | ||
| IAE 1P16050 Puller | 0AM53 | IAE 1P16050 | 1 | |
| IAE 1P16056 Hand wrench | 0AM53 | IAE 1P16056 | 1 | |
| IAE 1P16058 Removal/installation jaws assembly | 0AM53 | IAE 1P16058 | 1 | |
| IAE 1P16060 Protective cover | 0AM53 | IAE 1P16060 | 1 | (alternative to IAE 1P17758) |
| IAE 1P16123 Drift | 0AM53 | IAE 1P16123 | 1 | (superceded by IAE 1P16470) |
| IAE 1P16186 Gage bar | 0AM53 | IAE 1P16186 | 1 | (alternative to IAE 1P16265) |
| IAE 1P16187 Loading fixture | 0AM53 | IAE 1P16187 | 1 | |
| IAE 1P16225 Adapter | 0AM53 | IAE 1P16225 | 1 | |
| IAE 1P16265 Checking fixture | 0AM53 | IAE 1P16265 | 1 | (alternative to IAE 1P16186) |
| IAE 1P16272 Adapter | 0AM53 | IAE 1P16272 | 1 | |
| IAE 1P16470 Drift | 0AM53 | IAE 1P16470 | 1 | (supercedes IAE 1P16123) |
| IAE 1P16543 Removal/Installation fixture | 0AM53 | IAE 1P16543 | 1 | |
| IAE 1P17509 Protective cover | 0AM53 | IAE 1P17509 | 1 | |
| IAE 1P17515 Gage | 0AM53 | IAE 1P17515 | 1 | |
| IAE 1P17758 Protective cover | 0AM53 | IAE 1P17758 | 1 | (alternative to IAE 1P16060) |
| IAE 6F10027 Heater control unit | 0AM53 | IAE 6F10027 | 1 |
Consumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 06-153 FELT TIP MARKER, RAPID DRYING | LOCAL | CoMat 06-153 | ||
| CoMat 06-153X FELT TIP MARKER, RAPID DRYING, FINE POINT, BLACK, TRACE ELEMENT CERTIFIED | 86874 | CoMat 06-153X | ||
| CoMat 06-158 MARKER, EXTRA FINE POINT(BLACK) | LOCAL | CoMat 06-158 | ||
| CoMat 10-077 APPROVED ENGINE OILS | X333X | CoMat 10-077 | ||
| CoMat 10-129 ANTI-SEIZE PASTE | 34568 | CoMat 10-129 |
Spares
NONESafety Requirements
NONEProcedure
Refer to Figure.
Reference clearance at location 2225. If required, use the data written as a note in TASK 72-41-13-200-001-A00 (INSPECTION-001) and TASK 72-41-13-200-001-B00 (INSPECTION-001).
Table 1. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2225
HPC Drive Turbine Shaft ENGINE-HP COMPRESSOR SHAFT (72-41-13, 01-850), Journal Diameter
No. 4 Bearing Spacer ENGINE-ATTACH PARTS & FITTINGS-HP SYSTEM (72-40-00, 03-003 thru 03-035), Bore
HPC Drive Turbine Shaft Journal Diameter
5.107
Clear
5.108
0.003
Spacer Bore
5.111
0.006
5.113
Clear
Table 2. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2225
HPC drive turbine shaft ENGINE-HP COMPRESSOR SHAFT (72-41-13, 01-850), Journal Diameter
No. 4 Bearing Spacer ENGINE-ATTACH PARTS & FITTINGS-HP SYSTEM (72-40-00, 03-003 thru 03-035), Bore
HPC Turbine Drive Shaft Journal Diameter
129.718
Clear
129.743
0.077
Spacer Bore
129.819
0.152
129.870
Clear
SUBTASK 72-00-45-220-051 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2225
Refer to Figure.
Reference interference at location 2246. If required, use the data written as a note in TASK 72-45-11-200-001-A00 (INSPECTION-001), TASK 72-45-11-200-001-B00 (INSPECTION-001), TASK 72-45-11-200-001-C00 (INSPECTION-001) and TASK 72-41-13-200-001-A00 (INSPECTION-001), TASK 72-41-13-200-001-B00, (INSPECTION-001).
Table 3. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2246
Front Turbine Hub ENGINE-STAGE 1 TURBINE HUB (72-45-11, 01-010), Bore
HPC Drive Turbine Shaft ENGINE-HP COMPRESSOR SHAFT (72-41-13, 01-850), Location Diameter
Hub Bore
5.102
Intf
5.101
0.005
Shaft Location Diameter
5.108
0.007
5.107
Intf
Table 4. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2246
Front Turbine Hub ENGINE-STAGE 1 TURBINE HUB (72-45-11, 01-010), Bore
HPC Drive Turbine Shaft ENGINE-HP COMPRESSOR SHAFT (72-41-13, 01-850), Location Diameter
Hub Bore
129.590
Intf
129.565
0.127
Shaft Location Diameter
129.743
0.177
129.718
Intf
SUBTASK 72-00-45-220-052 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2246
Refer to Figure.
Reference interference at location 2249. If required, use the data written as a note in TASK 72-45-31-200-001-C00 (INSPECTION-001), TASK 72-41-13-200-001-B00 (INSPECTION-001) and TASK 72-45-31-200-001-A00 (INSPECTION-001).
Table 5. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2249
HPC Drive Turbine Shaft ENGINE-HP COMPRESSOR SHAFT (72-41-13, 01-850), Location Diameter
Stage 2 Turbine Hub ENGINE-STAGE 2 TURBINE HUB(72-45-31, 01-010), Bore
Shaft Location Diameter
4.842
Intf
4.842
Intf
4.841
0.010
4.841
0.010
Hub Bore
4.831
0.012
4.8313
0.012
4.830
Intf
4.830
Intf
Table 6. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2249
HPC Drive Turbine Shaft ENGINE-HP COMPRESSOR SHAFT (72-41-13, 01-850), Location Diameter
Stage 2 turbine hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-010), bore
Shaft Location Diameter
122.987
Intf
122.987
Intf
122.962
0.254
122.962
0.254
Hub Bore
122.707
0.304
122.715
0.304
122.682
Intf
122.682
Intf
SUBTASK 72-00-45-220-055-A00 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2249 (Pre SBE 72-0075)
SBE 72-0075: Recontoured stage 1 and stage 2 hubs.
Refer to Figure.
Reference interference at location 2249. If required, use the data written as a note in TASK 72-45-31-200-001-C00 (INSPECTION-001), TASK 72-41-13-200-001-B00 (INSPECTION-001) and TASK 72-41-13-200-001-B00 (INSPECTION-001).
Table 7. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Select)
REJECT IF
MORE THAN
LOCATION 2249
HPC Drive Turbine Shaft ENGINE-HP COMPRESSOR SHAFT (72-41-13, 01-850), Location Diameter
Stage 2 Turbine Hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-010), Bore
Shaft Location Diameter
4.842
Intf
4.842
Intf
4.841
0.005
4.841
0.005
Hub Bore
4.836
0.007
4.8364
0.007
4.835
Intf
4.8345
Intf
Table 8. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Select)
REJECT IF
MORE THAN
LOCATION 2249
HPC Drive Turbine Shaft ENGINE-HP COMPRESSOR SHAFT (72-41-13, 01-850), Location Diameter
Stage 2 Turbine Hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-010), Bore
Shaft Location Diameter
122.987
Intf
122.987
Intf
122.962
0.128
122.962
0.128
Hub Bore
122.834
0.178
122.844
0.178
122.809
Intf
122.796
Intf
SUBTASK 72-00-45-220-055-B00 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2249 (SBE 72-0075)
Refer to Figure.
Reference clearance at location 2250. If required, use the data written as a note in TASK 72-45-31-200-001-C00 (INSPECTION-001), TASK 72-41-13-200-001-B00 (INSPECTION-001) and TASK 72-40-00-200-001 (INSPECTION-001).
Table 9. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
Location 2250
HPC Drive turbine shaft ENGINE-HP COMPRESSOR SHAFT (72-41-13, 01-850),
HPC drive turbine nut HPC Module - Attaching Parts (72-40-00, 04-020)
Shaft diameter
4.819
Clear
4.819
Clear
4.821
0.002
4.821
0.002
Nut diameter
4.823
0.006
4.823
0.009
4.825
Clear
4.828
Clear
Table 10. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
Location 2250
HPC drive turbine shaft ENGINE-HP COMPRESSOR SHAFT (72-41-13, 01-850),
HPC drive turbine nut HPC Module - Attaching Parts (72-40-00, 04-020)
Shaft diameter
122.403
Clear
122.403
Clear
122.453
0.051
122.453
0.051
Nut diameter
122.505
0.152
122.505
0.229
122.555
Clear
122.631
Clear
SUBTASK 72-00-45-220-056 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2250
Refer to Figure.
Reference interference at location 2253. If required, use the data written as a note in TASK 72-45-21-200-001 (INSPECTION-001) and TASK 72-44-10-200-001-A00 (INSPECTION-001).
Table 11. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2253
Turbine Case Assembly ENGINE-HP TURBINE CASE ASSEMBLY (72-45-21, 01-010), Location Diameter
Stage 1 HPT Support Assembly ENGINE-STAGE 1 HPT SUPPORT ASSEMBLY (72-44-10, 01-010), Location Diameter
Case Assembly Location Diameter
28.233
Intf
28.233
Intf
28.227
0.002
28.222
0.002
Support Assembly Location Diameter
28.241
0.014
28.241
0.019
28.235
Intf
28.230
Intf
Table 12. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2253
Turbine Case Assembly ENGINE-HP TURBINE CASE ASSEMBLY (72-45-21, 01-010), Location Diameter
Stage 1 HPT Support Assembly ENGINE-STAGE 1 HPT SUPPORT ASSEMBLY (72-44-10, 01-010), Location Diameter
Case Assembly Location Diameter
717.118
Intf
717,118
Intf
716.966
0.05
716.839
0.050
Support Assembly Location Diameter
717.321
0.36
717.321
0.483
717.169
Intf
717.040
Intf
SUBTASK 72-00-45-220-057 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2253
Refer to Figure.
Reference interference at location 5624. If required, use the data written as a note in TASK 72-50-21-200-001-A00 (INSPECTION-001) and TASK 72-45-27-200-001-A00 (INSPECTION-001).
Table 13. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 5624
LPT Case Assembly ENGINE-LP TURBINE CASE (72-50-21, 01-010), Location Diameter
Stage 2 HPT Support Assembly ENGINE-STAGE 2 HPT SUPPORT ASSEMBLY (72-45-27, 01-010), Location Diameter
Case Diameter
28.533
Intf
28.533
Clear
28.527
0.002
28.527
0.004
Support Diameter
28.541
0.014
28.541
0.014
28.535
Intf
28.529
Intf
Table 14. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 5624
LPT Case Assembly ENGINE-LP TURBINE CASE (72-50-21, 01-010), Location Diameter
Stage 2 HPT Support Assembly ENGINE-STAGE 2 HPT SUPPORT ASSEMBLY (72-45-27, 01-010), Location Diameter
Case Diameter
724.738
Intf
724.738
Clear
724.586
0.050
724.586
0.102
Support Diameter
724.941
0.356
724.941
0.356
724.789
Intf
724.637
Intf
SUBTASK 72-00-45-220-058 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 5624
Refer to Figure.
Calculate the clearance at Location 5623.
Table 15. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Select)
REJECT IF
MORE THAN
LOCATION 5623
Stage 2 Blade Retaining Plate ENGINE-STAGE 2 HPT BLADE RETAINING PLATE (72-45-33, 01-020), Knife Edge Outside Diameter
Inner Turbine Duct ENGINE-LP TURBINE INNER STATIC SEALS (72-50-24, 01-010), Inside Diameter
Knife Edge Outside Diameter
19.807
Clear
19.797
Clear
19.812
0.084
19.812
0.084
Turbine Duct Inside Diameter
19.896
0.118
19.896
0.118
19.925
Clear
19.925
Clear
Table 16. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Select)
REJECT IF
MORE THAN
LOCATION 5623
Stage 2 Blade Retaining Plate ENGINE-STAGE 2 HPT BLADE RETAINING PLATE (72-45-33, 01-020), Knife edge outside diameter
Inner Turbine Duct ENGINE-LP TURBINE INNER STATIC SEALS (72-50-24, 01-010), Inside Diameter
Knife Edge Outside Diameter
503.10
Clear
502.84
Clear
503.22
2.13
503.22
2.13
Turbine Duct Inside Diameter
505.36
3.00
505.36
3.00
506.10
Clear
506.10
Clear
SUBTASK 72-00-45-220-059 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 5623 (Pre SBE 72-0028)
Refer to Figure.
Calculate the clearance at Location 5623.
Table 17. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Select)
REJECT IF
MORE THAN
LOCATION 5623
Stage 2 Blade Retaining Plate ENGINE-STAGE 2 HPT BLADE RETAINING PLATE (72-45-33, 01-020), Knife Edge Outside Diameter
Inner Turbine Duct ENGINE-LP TURBINE INNER STATIC SEALS (72-50-24, 01-010), Inside Diameter
Knife Edge Outside Diameter
19.804
Clear
19.797
Clear
19.812
0.084
19.812
0.084
Turbine Duct Inside Diameter
19.896
0.121
19.896
0.121
19.925
Clear
19.925
Clear
Table 18. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Select)
REJECT IF
MORE THAN
LOCATION 5623
Stage 2 Blade Retaining Plate ENGINE-STAGE 2 HPT BLADE RETAINING PLATE (72-45-33, 01-020), Knife Edge Outside Diameter
Inner Turbine Duct ENGINE-LP TURBINE INNER STATIC SEALS (72-50-24, 01-010), Inside Diameter
Knife Edge Outside Diameter
503.02
Clear
502.84
Clear
503.22
2.13
503.22
2.13
Turbine Duct Inside Diameter
505.36
3.07
505.36
3.07
506.10
Clear
506.10
Clear
SUBTASK 72-00-45-220-258 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 5623 (SBE 72-0028)
Refer to Figure.
Reference the clearance at location 2256. If required, use the data written as a note in TASK 72-44-60-200-001 (INSPECTION-001) and TASK 72-45-11-200-001-B00 (INSPECTION-001), TASK 72-45-11-200-001-C00 (INSPECTION-001).
Table 19. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2256
Radial clearance
Stage 1 HPT Duct Segment ENGINE-STAGE 1 HPT SEGMENT (72-44-60, 01-010)
Stage 1 HPT Hub ENGINE-STAGE 1 TURBINE HUB (72-45-11, 01-010) and Blade ENGINE-STAGE 1 HPT BLADE ASSEMBLY (72-45-14, 01-010) assembly
Stage 1 HPT Duct Segment
10.710
Clear
10.720
0.051
Stage 1 HPT Hub And Blade Assembly
10.771
0.071
10.801
Clear
Table 20. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2256
Radial clearance
Stage 1 HPT Duct Segment ENGINE-STAGE 1 HPT SEGMENT (72-44-60, 01-010)
Stage 1 HPT Hub ENGINE-STAGE 1 TURBINE HUB (72-45-11, 01-010) and Blade ENGINE-STAGE 1 HPT BLADE ASSEMBLY (72-45-14, 01-010) Assembly
Stage 1 HPT Duct Segment
272.03
Clear
272.29
1.295
Stage 1 HPT Hub And Blade Assembly
273.58
1.80
274.35
Clear
SUBTASK 72-00-45-220-060 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2256
Refer to Figure.
Reference clearance at location 2257. If required, use the data written as a note in TASK 72-45-12-200-001-A00 (INSPECTION-001), TASK 72-45-12-200-001-B00 (INSPECTION-001), TASK 72-45-12-200-001-C00 (INSPECTION-001), TASK 72-45-12-200-001-D00 (INSPECTION-001) and TASK 72-44-50-200-001-A00 (INSPECTION-001), TASK 72-44-50-200-001-B00 (INSPECTION-001).
Table 21. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2257
Stage 1 And 2 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (OUTER) (72-45-12, 01-040), Knife Edge Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife Edge Outside Diameter
11.381
Clear
11.397
0.018
Seal Land Inside Diameter
11.415
0.064
11.445
Clear
Table 22. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2257
Stage 1 And 2 HPT Air Seal ENGINE-STAGE 1 HPT AIR SEAL (OUTER) (72-45-12, 01-040), Knife Edge Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife edge Outside Diameter
289.08
Clear
289.48
0.46
Seal Land Inside Diameter
289.94
1.63
290.70
Clear
SUBTASK 72-00-45-220-061 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2257
Refer to Figure.
Reference clearance at location 2258. If required, use the data written as a note in TASK 72-45-12-200-001-A00 (INSPECTION-001), TASK 72-45-12-200-001-B00 (INSPECTION-001), TASK 72-45-12-200-001-C00 (INSPECTION-001), TASK 72-45-12-200-001-D00 (INSPECTION-001) and TASK 72-44-50-200-001-A00 (INSPECTION-001), TASK 72-44-50-200-001-B00 (INSPECTION-001).
Table 23. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2258
Stage 1 And 2 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (OUTER) (72-45-12, 01-040), Knife Edge Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife edge Outside Diameter
11.481
Clear
11.497
0.018
Seal Land Inside Diameter
11.515
0.064
11.545
Clear
Table 24. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2258
Stage 1 And 2 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (OUTER) (72-45-12, 01-040), Knife Edge Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife edge Outside Diameter
291.62
Clear
292.02
0.46
Seal land ID
292.48
1.63
293.24
Clear
SUBTASK 72-00-45-220-062 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2258
Refer to Figure.
Reference clearance at location 2259. If required, use the data written as a note in TASK 72-45-12-200-001-A00 (INSPECTION-001), TASK 72-45-12-200-001-B00 (INSPECTION-001), TASK 72-45-12-200-001-C00 (INSPECTION-001), TASK 72-45-12-200-001-D00 (INSPECTION-001) and TASK 72-44-50-200-001-A00 (INSPECTION-001), TASK 72-44-50-200-001-B00 (INSPECTION-001).
Table 25. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2259
Stage 1 And 2 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (OUTER) (72-45-12, 01-040), knife edge outside diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife Edge Outside Diameter
11.581
Clear
11.597
0.018
Seal Land Inside Diameter
11.615
0.064
11.645
Clear
Table 26. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2259
Stage 1 And 2 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (OUTER) (72-45-12, 01-040), Knife Edge Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife Edge Outside Diameter
294.16
Clear
294.56
0.46
Seal Land Inside Diameter
295.02
1.63
295.78
Clear
SUBTASK 72-00-45-220-063Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at location 2259
Refer to: Figure.
Reference clearance at location 2260. If required, use the data written as a note in TASK 72-45-13-200-001-A00 (INSPECTION-001), TASK 72-45-13-200-001-B00 (INSPECTION-001) and TASK 72-44-50-200-001-A00 (INSPECTION-001), TASK 72-44-50-200-001-B00 (INSPECTION-001).
Table 27. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2260
Stage 1 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (INNER) (72-45-13, 01-020), Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife Edge Outside Diameter
8.927
Clear
8.921
Clear
8.933
0.022
8.933
0.022
Seal Land Inside Diameter
8.955
0.038
8.955
0.038
8.965
Clear
8.965
Clear
Table 28. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2260
Stage 1 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (INNER) (72-45-13, 01-020), Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife Edge Outside Diameter
226.746
Clear
226.593
Clear
226.898
0.56
226.898
0.56
Seal Land Inside Diameter
227.46
0.97
227.46
0.97
227.71
Clear
227.71
Clear
SUBTASK 72-00-45-220-064Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2260
Refer to Figure.
Reference clearance at location 2261. If required, use the data written as a note in TASK 72-45-13-200-001-A00 (INSPECTION-001), TASK 72-45-13-200-001-B00 (INSPECTION-001) and TASK 72-44-50-200-001-A00 (INSPECTION-001), TASK 72-44-50-200-001-B00 (INSPECTION-001).
Table 29. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2261
Stage 1 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (INNER) (72-45-13, 01-020), Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife Edge Outside Diameter
9.027
Clear
9.021
Clear
9.033
0.022
9.033
0.022
Seal Land ID
9.055
0.038
9.055
0.038
9.065
Clear
9.065
Clear
Table 30. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2261
Stage 1 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (INNER) (72-45-13, 01-020), Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife Edge Outside Diameter
229.286
Clear
229.133
Clear
229.438
0.56
229.438
0.56
Seal Land Inside Diameter
230.00
0.97
230.00
0.97
230.25
Clear
230.25
Clear
SUBTASK 72-00-45-220-065 Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2261
Refer to: Figure.
Reference clearance at location 2262. If required, use the data written as a note in TASK 72-45-13-200-001-A00 (INSPECTION-001), TASK 72-45-13-200-001-B00 (INSPECTION-001) and TASK 72-44-50-200-001-A00 (INSPECTION-001), and TASK 72-44-50-200-001-B00 (INSPECTION-001).
Table 31. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2262
Stage 1 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (INNER) (72-45-13, 01-020), Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife Edge Outside Diameter
9.127
Clear
9.121
Clear
9.133
0.022
9.133
0.022
Seal Land Inside Diameter
9.155
0.038
9.155
0.038
9.165
Clear
9.165
Clear
Table 32. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
(Non-select)
REJECT IF
MORE THAN
LOCATION 2262
Stage 1 HPT Airseal ENGINE-STAGE 1 HPT AIR SEAL (INNER) (72-45-13, 01-020), Outside Diameter
Stage 1 HPT Cooling Duct Assembly ENGINE-STAGE 1 HPT COOLING DUCT ASSEMBLY (72-44-50, 01-010), Seal Land Inside Diameter
Knife edge Outside Diameter
231.826
Clear
231.673
Clear
231.978
0.56
231.978
0.56
Seal Land Inside Diameter
232.54
0.97
232.54
0.97
232.79
Clear
232.79
Clear
SUBTASK 72-00-45-220-066Reference Fits and Clearances of the HP Turbine Rotor and Stator Assembly at Location 2262
Install the IAE 1P16046 Removal/Installation fixture or IAE 1P16543 Removal/Installation fixture 1 off.
NOTE
Make sure when you take the measurements that the vernier does not go into the slots that are located on the hub flange.Measure the distance from the two machined areas of the fixture to the rear flange of the Stage 2 Hub. Use a depth vernier, Figure.
Check to see if the HP Turbine Rotor And Stator Assembly is in the proper running position.
Install the IAE 1P16058 Removal/installation jaws assembly 1 off.
Install the scalloped plate, detail of the IAE 1P16047 Hydraulic adapter 1 off or the IAE 1P16272 Adapter 1 off, to the rear inner flange of the fixture.
Attach the IAE 1F10052 Two cables sling 1 off to the turning spools on the fixture.
SUBTASK 72-00-45-420-051-A00 Install the Tooling to the HP Turbine Rotor and Stator Assembly (Pre SBE 72-0075)
Install the IAE 1P16046 Removal/Installation fixture or IAE 1P16543 Removal/Installation fixture 1 off.
NOTE
Make sure when you take the measurements that the vernier does not go into the slots that are located on the hub flange.Measure the distance from the two machined areas of the fixture to the rear flange of the Stage 2 Hub. Use a depth vernier, Figure.
Check to see if the HP Turbine Rotor And Stator Assembly is in the proper running position.
Install the IAE 1P16058 Removal/installation jaws assembly 1 off.
Install the scalloped plate, detail of the IAE 1P16047 Hydraulic adapter 1 off or the IAE 1P16272 Adapter 1 off, to the rear inner flange of the fixture.
Attach the IAE 1F10052 Two cables sling 1 off to the turning spools on the fixture.
SUBTASK 72-00-45-420-051-B00 Install the Tooling to the HPT Rotor and Stator Assembly (SBE 72-0075 and SBE 72-0123)
If the C - B calculation results in a class 9 or 10 spacer - Install a class 11 spacer.
If the C - B calculation results in a class spacer that is less than 9 - Install a class 10 spacer.
If the C - B calculation results in a class 13 or 14 spacer - Install a class 12 spacer.
If the C - B calculation results in a class spacer that is more than 14 - Install a class 13 spacer.
Use the guidelines for correct bearing tolerances that follow so you can meet the final assembly check:
Usually, the necessary spacer will be a class 11 or 12. After you subtract dimension B from dimension C, if a different class is necessary, check the measurements and do the calculation again.
Subtract dimension B from dimension C and the result will be the required No. 4 bearing spacer dimension.
After you have machined the spacer, mark the new class number at the location shown in Figure. Cross off old class marking. Refer to SPM TASK 70-09-00-400-501. Use vibration peen method. Remove high metal.
If the correct class spacer is not available, you can machine a larger (numerically higher) class spacer to a smaller (numerically lower) class spacer as follows:
Use the table to find the correct class of the spacer, refer to Figure.
Install the spacer ENGINE-ATTACH PARTS & FITTINGS-HP SYSTEM (72-40-00, 03-003 thru ENGINE-ATTACH PARTS & FITTINGS-HP SYSTEM 03-035) over the HP Compressor rear hub with the puller groove to the rear of the engine. The spacer must touch the No. 4 bearing rear seal seat. Position the spacer with the IAE 1P16470 Drift 1 off. See Figure.
SUBTASK 72-00-45-420-052 Get the No. 4 Bearing Spacer Dimension
Refer to Figure.
Remove the pin and remove the cover from the IAE 1P16040 Heater 1 off.

CAUTION
REMOVE THE THERMOCOUPLE FROM THE HEATER BEFORE THE HP TURBINE ROTOR AND STATOR ASSEMBLY IS INSTALLED. IF THIS IS NOT DONE, DAMAGE TO THE THERMOCOUPLE MAY RESULT.Turn the HP Turbine Rotor And Stator Assembly to the front end down position and lower on to the heater until the case flange rests on the heater flange.
Attach the heater to the IAE 6F10027 Heater control unit 1 off. Heat the HP turbine rotor and stator assembly to 400 deg F (204 deg C).
SUBTASK 72-00-45-420-053 Install the HP Turbine Rotor and Stator Assembly on to the Heater
Refer to Figure.
Remove the puller rod if it is on the end of the IAE 1P16050 Puller 1 off.
NOTE
The detail 33 puller rod of IAE 1P16050 Puller 1 off must be used with IAE 1P16272 Adapter 1 off.Install the puller rod on to the puller shaft until the pin in the puller rod touches the capscrew in the puller shaft.
Install the puller to the HP Compressor rear hub.
SUBTASK 72-00-45-420-054 Install the Puller in to the HP Compressor Rear Hub
Refer to Figure.
The hub splines are correctly engaged if the distance T is 0.625 in. (15.875 mm) or less. Refer to Figure.
Make sure the splines are engaged correctly.
Align the dowel pin in the case flange with the offset hole in the diffuser case flange and the stage 1 HP Turbine Support Assembly and align the Stage 1 Turbine Hub splines with the splines on the HP Compressor rear hub.
Install the threaded plate, detail of the IAE 1P16272 Adapter 1 off over the puller rod and in to the scalloped plate detail of the adapter.
Attach the IAE 1F10026 Hydraulic hand pump 1 off to the hydraulic cylinder.
SUBTASK 72-00-45-420-055 Install the HP Turbine Rotor and Stator Assembly to the HP Compressor Rear Hub
Refer to Figure.
If the difference is less than plus 0.008 in. (plus 0,203 mm), reject the module and check the offset again for the stage 1 HPT vane support. Refer to TASK 72-44-10-200-001-A00.
Use a piece of shim stock to take clearance measurements of one blade at the top and bottom as shown in the figure.
Check the blade tip clearance as follows:
SUBTASK 72-00-45-420-080 Inspect the Stage 2 HPT Blade Tip Clearance for Offset
NOTE
A check of the blade tip clearance on the Stage 2 HPT blade tip is necessary to inspect for the clearance offset in the HPT.NOTE
This cover is used to prevent damage to the rotor assembly when the tools are installed to torque the bearing retaining nut.Install the IAE 1P17509 Protective cover 1 off to the rear flange of the HP Turbine Rotor And Stator Assembly.
NOTE
The bearing retaining nut must be stripped and silver plated when you install or remove the nut more than five times or engine operation has occurred. Refer to Repair, VRS1298 TASK 72-32-54-300-003.Apply CoMat 10-129 ANTI-SEIZE PASTE to the mating surface of the HP Turbine retaining nut.
Install the bearing retaining nut with the IAE 1P16056 Hand wrench 1 off. Wipe off excess paste.
Loosen the wingnuts on all the clamp assemblies on IAE 1P16225 Adapter 1 off. Move the clamps in the clockwise direction (opposite direction of arrows).
Install the IAE 1P16011 Wrench 1 off through the adapter to engage the retaining nut spline.
NOTE
You can use IAE 1F10016 Mechanical wrench as an alternative to IAE 1F10015 Hydraulic wrench .Lift the IAE 1F10015 Hydraulic wrench 1 off (Figure) with a hoist and install over the wrench. Engage the anti-torque pins on the wrench with the holes in the adapter. Tighten the hex head bolts to hold the wrench to the adapter.
Install the tools to torque the bearing retaining nut.
Make a temporary mark on the shaft and the nut to show the related location with CoMat 06-153 FELT TIP MARKER, RAPID DRYING, CoMat 06-153 FELT TIP MARKER, RAPID DRYINGX or CoMat 06-158 MARKER, EXTRA FINE POINT(BLACK). Refer to SPM TASK 70-09-00-400-501.
Torque the bearing retaining nut.
Install the No. 4 bearing lock HPC Module - Attaching Parts (72-40-00, 04-060).
Install the retaining ring HPC Module - Attaching Parts (72-40-00, 04-040) to hold the lock in position.
SUBTASK 72-00-45-420-057-A00 Install the Bearing Retaining Nut (Pre SBE 72-0075)
NOTE
This cover is used to prevent damage to the rotor assembly when the tools are installed to torque the bearing retaining nut.Install the IAE 1P17509 Protective cover 1 off to the rear flange of the HP Turbine Rotor And Stator Assembly.
NOTE
The bearing retaining nut must be stripped and silver plated when you install or remove the nut more than five times or engine operation has occurred. Refer to Repair, VRS1298 TASK 72-32-54-300-003.Apply CoMat 10-129 ANTI-SEIZE PASTE to the mating surface of the HP Turbine retaining nut.
Install the bearing retaining nut with the IAE 1P16056 Hand wrench 1 off. Wipe off excess paste.
Loosen the wingnuts on all the clamp assemblies on IAE 1P16225 Adapter 1 off. Move the clamps in the clockwise direction (opposite direction of arrows).
Install the IAE 1P16011 Wrench 1 off through the adapter to engage the retaining nut spline.
NOTE
You can use IAE 1F10016 Mechanical wrench as an alternative to IAE 1F10015 Hydraulic wrench .Lift the IAE 1F10015 Hydraulic wrench 1 off with a hoist and install over the wrench. Engage the anti-torque pins on the wrench with the holes in the adapter. Tighten the hex head bolts to hold the wrench to the adapter.
Install the tools to torque the bearing retaining nut.
Make a temporary mark on the shaft and the nut to show the related location with CoMat 06-153 FELT TIP MARKER, RAPID DRYING, CoMat 06-153 FELT TIP MARKER, RAPID DRYINGX or CoMat 06-158 MARKER, EXTRA FINE POINT(BLACK). Refer to SPM TASK 70-09-00-400-501.
Torque the bearing retaining nut.
Install the No.4 bearing lock HPC Module - Attaching Parts (72-40-00, 04-060).
Install the retaining ring HPC Module - Attaching Parts (72-40-00, 04-040) to hold the lock in position.
SUBTASK 72-00-45-420-057-B00 Install the Bearing Retaining Nut (SBE 72-0075)
Install the IAE 1P16187 Loading fixture 1 off to the rear of the HP turbine. Hold the Stage 2 HP Turbine support rear flange face with the 12 socket head capscrews, through the rear flange from the front, and the nuts.
Load the HP turbine assembly as follows:
Install the IAE 1P16186 Gage bar 1 off.
Install the IAE 1P16060 Protective cover 1 off or the IAE 1P17758 Protective cover 1 off to the rear flange of the HP turbine rotor and stator assembly. Put equal hand pressure on the outer edge, of the cover to hold in position.
SUBTASK 72-00-45-220-067-A01 Check the HP Turbine Assembly Running Distance (Pre SBE 72-0075)
Install the IAE 1P16187 Loading fixture 1 off to the rear of the HP turbine. Hold the stage 2 HP turbine support rear flange face with the 12 socket head capscrews, through the rear flange from the front, and the nuts.
Load the HP turbine assembly as follows:
Install the IAE 1P16265 Checking fixture 1 off.
Install the IAE 1P16060 Protective cover 1 off or the IAE 1P17758 Protective cover 1 off to the rear flange of the HP turbine rotor and stator assembly. Put equal hand pressure on the outer edge of the cover to hold in position.
SUBTASK 72-00-45-220-067-A02 Check the HP Turbine Assembly Running Distance (Pre SBE 72-0075)
SBE 72-0075: Recontoured stage 1 and stage 2 hubs
Install the IAE 1P16187 Loading fixture 1 off to the rear of the HP turbine. Hold the Stage 2 HP Turbine support rear flange face with the 12 socket head capscrews, through the rear flange from the front, and the nuts.
Load the HP turbine assembly as follows:
Install the IAE 1P17515 Gage 1 off.
Install the IAE 1P16060 Protective cover 1 off or the IAE 1P17758 Protective cover 1 off to the rear flange of the HP turbine rotor and stator assembly. Put equal hand pressure on the outer edge, of the cover to hold in position.
SUBTASK 72-00-45-220-067-B02 Check the HP Turbine Assembly Running Distance (SBE 72-0075)
Diassemble. Refer to TASK 72-00-45-020-001-A01; then Repair, VRS3238 TASK 72-45-31-300-001 (REPAIR-001)
Dents, nicks and scratches
Examine the Stage 2 Turbine Hub for dents, nicks and scratches that occured during the assembly process.
SUBTASK 72-00-45-220-219 Examine the Stage 2 Turbine Hub for Damage
Figure: HP Turbine Assembly and Related Parts
HP Turbine Assembly and Related Parts

Figure: Installation Tooling for the HP Turbine Assembly
Installation Tooling for the HP Turbine Assembly

Figure: Engine Dimension
Engine Dimension

Figure: HP Turbine Assembly Dimensions
HP Turbine Assembly Dimensions

Figure: No.4 Bearing Spacer Installation
No.4 Bearing Spacer Installation

Figure: Install the HP Turbine Assembly on to the Heater
Install the HP Turbine Assembly on to the Heater

Figure: Puller Installed in HP Compressor Rear Hub
Puller Installed in HP Compressor Rear Hub

Figure: Install the HP Turbine Assembly to the Engine
Sheet 1

Figure: HP Turbine Rotor and Stator Assembly Blade Tip Clearance Check
Sheet 2

Figure: HPC Rear Shaft Inspection Location for Surface Damage
Sheet 3

Figure: Bearing Retaining Nut
Bearing Retaining Nut

Figure: Retaining Nut Tooling
Retaining Nut Tooling

Figure: Hydraulic wrench Package
Hydraulic wrench Package

Figure: The HP Turbine Rotor and Stator Assembly - Fits and Clearances
Sheet 1

Figure: The HP turbine rotor and stator assembly - Fits and Clearances
Sheet 2

Figure: Load the HP Turbine Assembly
Load the HP Turbine Assembly

Figure: Thickness of Spacer
Sheet 1

Figure: Machine the Thickness of the Spacer
Sheet 2

Figure: Install the IAE 1P16187 Load Fixture
Install the IAE 1P16187 Load Fixture

