TASK 72-44-50-200-001-F00 HPT Stage 1 Cooling (TOBI) Duct - Examine, Inspection-001

DMC:V2500-A0-72-44-5001-00F-310A-C|Issue No:001.00|Issue Date:2013-11-01

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

All

Common Information

TASK 72-44-50-200-001-F00 HPT Stage 1 Cooling (TOBI) Duct - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-010

2A3180-01

01-010

2A3487-01

General

This TASK gives the procedure for the inspection of the stage 1 HPT cooling duct. For the other part of the stage 1 HPT cooling duct assembly, refer to CoMat and SupEquip #s will be corrected once TIR is finalized. This comment serves as a blanket response for all comments related to CoMats and Support Equip in this document unless stated otherwise.CoMat and SupEquip #s will be corrected once TIR is finalized. This comment serves as a blanket response for all comments related to CoMats and Support Equip in this document unless stated otherwise.TASK 72-44-50-200-000 (INSPECTION/CHECK-000).

Fig/item numbers in parentheses in the procedure agree with those used in the IPC.

The policy that is necessary for inspection is given in the SPM TASK 70-20-00-200-501.

All the parts must be cleaned before any part is examined. Refer to the SPM TASK 70-10-00-100-501.

All parts must be visually examined for damage, corrosion and wear. Any defects that are not identified in the procedure must be referred to IAE.

The procedure for those parts which must have a crack test is given in Step and Step. Do the test before the part is visually examined.

Do not discard any part until you are sure there are no repairs available. Refer to the instructions in Repair before a discarded part is used again or oversize parts are installed.

Parts which should be discarded can be held although no repair is available. The repair of a discarded part could be shown to be necessary at a later date.

All parts must be examined to make sure that all the repairs have been completed satisfactorily.

The practices and processes referred to in the procedure by the TASK numbers are in the SPM.

References

Refer to the SPM for data on these items.

Definitions of Damage, SPM TASK 70-02-02-350-501

Inspection of Damage, SPM TASK 70-20-00-200-501

Record and Control of the Lives of Parts, SPM TASK 70-05-00-220-501

Some data on these items is contained in this TASK. For more data on these items refer to the SPM.

Method of Testing for Crack Indications

Chemical Processes

Surface Protection

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
IAE 2P16018 Airflow fixture0AM53IAE 2P160181
IAE 2P16019 Airflow adapter0AM53IAE 2P160191
IAE 2P16020 Leak test ring0AM53IAE 2P160201
IAE 2P16021 Airflow master0AM53IAE 2P160211
IAE 6P16080 Test bench0AM53IAE 6P160801

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 10-045 LEAK CHECK FLUID, BUBBLES-TYPE03530CoMat 10-045

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-44-50-230-068-001 Examine the Stage 1 HPT Cooling Duct (01-010) for Cracks

    1. Refer to Figure and Figure.

    2. Clean the Part. Refer to TASK 72-44-50-100-000 (CLEANING-000).

      3. Do the crack test on the part that is given below. Carefully examine the bolt flange at location 1, the rear side of the nozzle at location 2 and the cover plate weld at location 4. Use the applicable penetrant inspection procedures.

        PART IDENT

        TASK/SUBTASK

        Stage 1 HPT cooling duct

        1. Cracks

          1. Cracks in the outer flange that extend outward from the bolt holes

          1. Repair, VRS3558 TASK 72-44-50-300-011 (REPAIR-011)

          2. Cracks in the outer flange that extend inward from the bolt holes 0.125 in. (3.18 mm) or less

          1. Repair, VRS3558 TASK 72-44-50-300-011 (REPAIR-011)

          3. Cracks not more than 0.500 in. (12.70 mm), with more than 0.100 in. (2.54 mm) from either side of a corner radius of a snap diameter. Multiple cracks must be separated by a minimum of one-half the length of the longest crack

          1. Repair, VRS3587 TASK 72-44-50-300-012 (REPAIR-012)

          4. Cracks in the groove at location 9 not more than 0.250 in. (6.35 mm) long and a minimum distance of 2.000 in. (50.80 mm) between cracks

          1. Repair, VRS3587 TASK 72-44-50-300-012 (REPAIR-012)

          5. Cracks in the rear side of the nozzle at location 2 and the cover plate weld at location 4

          1. Repair, VRS3587 TASK 72-44-50-300-012 (REPAIR-012)

          6. Cracks in the air passage space at Location 10 not more than 0.125 in. (3.18 mm) put together length in a 0.200 x 0.200 in. (5.08 x 5.08 mm) square area separated by a minimum distance of 2.380 in. (60.45 mm). No through wall cracks are permitted

          1. Accept

          7. Cracks in the air pressure passage at Location 11

          1. Repair, VRS3808 TASK 72-44-50-300-017 (Repair-017)

    2. SUBTASK 72-44-50-230-068-002 Examine the Stage 1 HPT Cooling Duct (01-010) for Cracks

    1. Refer to Figure and Figure.

    2. Clean the Part. Refer to TASK 72-44-50-100-000 (CLEANING-000).

      3. Do the crack test on the part that is given below. Carefully examine the bolt flange at location 1, the rear side of the nozzle at location 2 and the cover plate weld at location 4. Use the applicable penetrant inspection procedures.

        PART IDENT

        TASK/SUBTASK

        Stage 1 HPT cooling duct

        1. Cracks

          1. Cracks in the outer flange that extend outward from the bolt holes

          1. Repair, VRS3558 TASK 72-44-50-300-011 (REPAIR-011)

          2. Cracks in the outer flange that extend inward from the bolt holes 0.125 in. (3.18 mm) or less

          1. Repair, VRS3558 TASK 72-44-50-300-011 (REPAIR-011)

          3. Cracks not more than 0.500 in. (12.70 mm), with more than 0.100 in. (2.54 mm) from either side of a corner radius of a snap diameter. Multiple cracks must be separated by a minimum of one-half the length of the longest crack

          1. Repair, VRS3587 TASK 72-44-50-300-012 (REPAIR-012)

          4. Cracks in the groove at location 9 not more than 0.250 in. (6.35 mm) long and a minimum distance of 2.000 in. (50.80 mm) between cracks

          1. Repair, VRS3587 TASK 72-44-50-300-012 (REPAIR-012)

          5. Cracks in the rear side of the nozzle at location 2 and the cover plate weld at location 4

          1. Repair, VRS3587 TASK 72-44-50-300-012 (REPAIR-012)

          6. Cracks in the air passage space at Location 10 not more than 0.125 in. (3.18 mm) put together length in a 0.200 x 0.200 in. (5.08 x 5.08 mm) square area separated by a minimum distance of 2.380 in. (60.45 mm). No through wall cracks are permitted

          1. Accept

          7. Cracks in the air pressure passage at Location 11

          1. Repair, VRS3808 TASK 72-44-50-300-017 (Repair-017)

    3. SUBTASK 72-44-50-220-109 Examine the Stage 1 HPT Cooling Duct (01-010) for Nicks, Corrosion, Dents and Burns

    1. Refer to Figure.

      2. Examine the cooling duct for nicks, corrosion, dents and burns.

        1. Nicks

        1. Repair, VRS3180 TASK 72-44-50-300-002 (REPAIR-002)

        2. Corrosion

        1. Repair, VRS3180 TASK 72-44-50-300-002 (REPAIR-002)

        3. Dents

          1. Dents with rounded bottoms not more than 0.010 in. (0.25 mm) in depth and not more than 0.500 in. (12.70 mm) diameter. The areas shown in Figure must not have dents

          1. Accept

          2. Other than Step

          1. Repair, VRS3180 TASK 72-44-50-300-002 (REPAIR-002)

        3. Burns in the outer flange.

          4. Burned sections with a maximum arc length of 1.50 in. (38.1 mm)

          1. Repair, VRS3558 TASK 72-44-50-300-011 (REPAIR-011) or Repair, VRS3593 TASK 72-44-50-300-013, (REPAIR-013)

          5. Burned section that do not extend beyond the top of the bolt holes. Only one location per flange is permitted.

          1. Repair, VRS3558 TASK 72-44-50-300-011 (REPAIR-011) or Repair, VRS3593 TASK 72-44-50-300-013, (REPAIR-013)

          6. Other than Step or Step

          1. Repair, VRS3601 TASK 72-44-50-300-014 (REPAIR-014)

    4. SUBTASK 72-44-50-220-110 Examine the Stage 1 HPT Cooling Duct (01-010) Nozzles for Unwanted Material

    1. Refer to Figure.

      2. Examine the cooling duct nozzles at location 2, for unwanted material.

        1. Unwanted material

        1. Reject

    5. SUBTASK 72-44-50-220-111 Examine the Stage 1 HPT Cooling Duct (01-010) Honeycomb Seal Lands for Pieces that are Broken Away, Flat Cells and Grooves

    1. Refer to Figure.

      2. Examine the cooling duct honeycomb seal lands at location 3, for pieces that are broken away, flat cells and grooves.

        1. Pieces that are broken away

        1. Repair, VRS3179 TASK 72-44-50-300-003 (REPAIR-003)

        2. Flat cells

        1. Repair, VRS3179 TASK 72-44-50-300-003 (REPAIR-003)

        3. Damaged or bent cells (except in the knife edge seal wear areas).

          1. A maximum of three rows of cells can be damaged up to 0.800 in. (20.32 mm) maximum on each strip (land)

          1. Accept

          2. Other than Step

          1. Repair, VRS3179 TASK 72-44-50-300-003 (REPAIR-003)

        4. Grooves

          1. If the groove does not go in to the base metal

          1. Accept

          2. Other than Step

          1. Repair, VRS3179 TASK 72-44-50-300-003 (REPAIR-003)

    6. SUBTASK 72-44-50-220-112 Examine the Stage 1 HPT Cooling Duct (01-010) Outside Diameter Contacts for Wear and Galling

    1. Refer to Figure.

      2. Examine the cooling duct at location 5, for wear and galling on the front diameter contact.

        1. Wear or galling

        1. Reject

      3. Examine the cooling duct at location 7, for wear and galling.

        1. Wear or galling

        1. Reject

      4. Examine the cooling duct at location 8, for wear and galling on the inner liner diameter contact.

        1. Wear or galling

        1. Reject

    7. SUBTASK 72-44-50-220-113 Examine the Stage 1 HPT Cooling Duct (01-010) Contact Surfaces for Wear and Galling

    1. Refer to Figure.

      2. Examine the cooling duct at location 1, for wear and galling on the bolt flange contact surface.

        1. Wear or galling.

          1. Not more than 0.005 in. (0.13 mm)

          1. Accept

          2. Other than Step

          1. Reject

      3. Examine the cooling duct at location 6, for wear and galling on the front contact surface.

        1. Wear or galling.

          1. Not more than 0.005 in. (0.13 mm)

          1. Accept

          2. Other than Step

          1. Reject

    8. SUBTASK 72-44-50-220-114 Examine the Stage 1 HPT Cooling Duct (01-010) for the Axial Dimensions of the Outside Diameter Flange

    1. Refer to Figure.

      2. NOTE

        If the measured axial dimensions in a free condition are not satisfactory, a held condition is permitted. All dimensions apply when Surface N is flat by 0.002 in. (0.05 mm) and Diameter L maintains a clearance envelope of 13.040 in. (331.22 mm) diameter in a free or held condition. Hold the duct only on Surfaces N, M and W, and Diameter L.

        Examine the cooling duct at location 1, for the axial dimension.

        1. Axial dimension.

          1. If the axial dimension is between 3.189 and 3.199 in. (81.00 and 81.26 mm)

          1. Accept

          2. Other than Step

          1. Repair, VRS3506 TASK 72-44-50-300-009 (REPAIR-009), Repair, VRS3618 TASK 72-44-50-300-015 (REPAIR-015)

      3. Examine the cooling duct at location 2, for the axial dimension of the outside diameter flange.

        1. Axial dimension.

          1. If the axial dimension is between 0.179 and 0.183 in. (4.55 and 4.65 mm)

          1. Accept

          2. Other than Step

          1. Repair, VRS3183 TASK 72-44-50-300-004 (REPAIR-004)

    9. SUBTASK 72-44-50-220-115 Examine the Stage 1 HPT Cooling Duct (01-010) Diameters

    1. NOTE

      If the measured diameters in a free condition are not satisfactory, a held condition is permitted. All dimensions apply when Surface N is flat by 0.002 in. (0.05 mm) and Diameter L maintains a clearance envelope of 13.040 in. (331.22 mm) diameter in a free or held condition. Hold the duct only on Surfaces N, M and W, and Diameter L.

      Refer to Fig. 72-44-50-990-047.

      2. Examine the cooling duct at location 2000, for the diameter.

        1. If the diameter is between 19.398 and 19.402 in. (492.71 and 492.81 mm)

        1. Accept

        2. Write down the dimension of the diameter.

        2. NOTE

          This part can be used only if the mating part has a diameter that will result in a fit of reference No. 2000. Refer to TASK 72-44-10-100-001-B00 (ASSEMBLY, CONFIG-002).

          If the diameter is between 19.393 and 19.402 in. (492.58 and 492.81 mm)

        1. Accept the part for select fit only

        2. Write down the dimension of the diameter.

        3. Other than Step or Step

        1. Repair, VRS3181TASK 72-44-50-300-005 (REPAIR-005)

      3. Examine the cooling duct at location 2006, for the diameter.

        1. If the diameter is between 17.360 and 17.370 in. (440.94 and 441.20 mm)

        1. Accept

        2. Write down the dimension of the diameter.

        2. Other than Step

        1. Repair, VRS3178 TASK 72-44-50-300-006 (REPAIR-006)

      4. Examine the cooling duct at location 2263, for the diameter.

        1. If the diameter is between 13.033 and 13.039 in. (331.04 and 331.20 mm)

        1. Accept

        2. Write down the dimension of the diameter.

        2. Other than Step

        1. Repair, VRS3307 TASK 72-44-50-300-007 (REPAIR-007)

    10. SUBTASK 72-44-50-220-116 Examine the Stage 1 HPT Cooling Duct (01-010) Honeycomb Seal Lands for Grooves

    1. Refer to Figure.

      2. Examine the cooling duct at location 3, for grooves in the honeycomb seal lands (6 locations).

        1. Circumferential grooves.

          1. Not more than 0.040 in. (1.02 mm) in depth and 0.300 in. (7.62 mm) in width

          1. Accept

          2. Other than Step

          1. Repair, VRS3179 TASK 72-44-50-300-003 (REPAIR-003)

        2. Axial grooves.

          1. If the axial length of the groove at location 6 is not more than the length of a seal land

          1. Accept

          2. If the circumferential width (location 8) is not more than 0.500 in. (12.70 mm)

          1. Accept

          3. If the maximum radial depth (location 4) is not more than 0.015 in. (0.38 mm)

          1. Accept

          4. If there is no more than a total of six grooves on the inner seal lands

          1. Accept

          5. If there is no more than a total of six grooves on the outer seal lands

          1. Accept

          6. If there is no high metal

          1. Accept

          7. Other than the above

          1. Repair, VRS3179 TASK 72-44-50-300-003 (REPAIR-003)

    11. SUBTASK 72-44-50-280-055 Examine the Stage 1 HPT Cooling Duct (01-010) by the Airflow Check

    1. CAUTION

      DO NOT PERFORM THE AIRFLOW CHECK UNTIL ALL OTHER INSPECTIONS AND REPAIRS HAVE BEEN COMPLETED.

      CAUTION

      DO THE PROCEDURE IN THE SEQUENCE GIVEN TO GET ACCURATE AIRFLOW DATA. MAKE SURE YOU DO ALL THE STEPS.

      Refer to Figure, Figure and Figure.

      2. NOTE

        This airflow check is necessary only if the airflow is changed by a service bulletin or the cooling duct vanes are repaired.

        NOTE

        To get accurate results, you must do a leak check and calibrate the test bench.

        NOTE

        If the test bench has absolute pressure gages, add the psig value given in the procedure to the current atmospheric pressure to get the psia value.

        Set up and do a leak check of the IAE 2P16018 Airflow fixture 1 off and the IAE 6P16080 Test bench 1 off.

      1. Select the sonic nozzle with the correct throat diameter. Use the mathematical or the graphic method of nozzle selection given in the SPM TASK 70-72-01-720-501.

        1. Install the IAE 2P16018 Airflow fixture 1 off on the test bench.

        2. Connect the air inlet line to the large port on the bottom of the fixture.

        3. Connect the air inlet pressure sensing line to the small port on the side of the fixture.

        4. If required, remove the plug that seals the large port on the side of the fixture and install a temperature probe in the port.

        5. Secure the IAE 2P16019 Airflow adapter 1 off with the IAE 2P16020 Leak test ring 1 off, detail screws and washers.

        6. Install the IAE 2P16020 Leak test ring 1 off on the inner ring of the adapter. Secure it with detail screws.

      3. Set up the test bench to do the airflow check on the cooling duct. Make sure that the P1 gage is connected to read the sonic nozzle inlet pressure. Make sure that the P3 gage is connected to read the cooling duct inlet pressure.

      4. If the test bench has absolute P1 and P3 pressure gages with adjustable dials, adjust the gages to indicate the current atmospheric pressure, or set the gages to zero if the gages indicate psig.

      5. Calculate the values for the pressure ratio method of testing.

        6. Do an airflow restriction check each time you install the IAE 2P16018 Airflow fixture 1 off.

        1. Set the P1 equal to the pressure for the cooling duct parameter.

        2. Write the P3 indication. The maximum P3 indication of 0.5 psig (3.4 kPa) is acceptable, but you should try to minimize the restriction for a more accurate airflow result.

        3. A P3 indication of more than 0.5 psig (3.4 kPa) restriction is not acceptable.

        4. Correct the cause of the restriction and do the check again.

      7. Do a check of the fixture seals.

      8. Clamp the IAE 2P16021 Airflow master 1 off in position on the fixture.

        9. Do a shutoff valve leak check on the IAE 6P16080 Test bench 1 off.

        1. Install rubber stoppers into all the holes of the IAE 2P16021 Airflow master 1 off.

        2. Close all the shutoff valves.

        3. Set P1 to the maximum bench capacity to pressurize the system upstream of the shutoff valves.

        4. Look at the P3 gage for a pressure increase. The maximum pressure increase is 0 psig (0 kPa) for one minute.

        5. WARNING

          RELEASE ANY PRESSURE AT THE END OF THE TEST OR BEFORE YOU DO ANY REPAIRS. INJURY TO THE OPERATOR CAN OCCUR IF THE PRESSURE IS NOT RELEASED.

          Release the pressure in the system upstream of the shutoff valves.

        6. If the P3 indication is not satisfactory, repair as necessary and do the leak check again.

        10. NOTE

          Do the leak check each day, before each time the airflow check is done or the test bench is repaired.

          Do leak check on the IAE 2P16018 Airflow fixture 1 off.

        1. Install rubber stoppers in all the holes in the master.

        2. Slowly open the air supply line and pressurize the system to 16 psig (110.4 kPa) on the P3 pressure gage.

        3. Close the valve to isolate the system.

        4. Look at the P3 gage for a pressure decrease. The maximum acceptable pressure decrease in the isolated system is 7.0 psig (48.3 kPa) in 14 seconds.

        5. If the pressure decrease is more than 7.0 psig (48.3 kPa) in 14 seconds, use CoMat 10-045 LEAK CHECK FLUID, BUBBLES-TYPE or a soap and water solution to find the source of the leak. The leaks must be repaired before you continue the airflow check.

        11. NOTE

          One master tool is usually calibrated to more than one set of airflow test limits. For each calibration or set of test limits, a separate calibration curve is given. Each curve gives co-ordinates of calibration point and a system of letters that are metal-stamped near the air holes. These letters indicate which air holes were open during calibration.

          Set up and do an airflow check of the IAE 2P16021 Airflow master 1 off.

        1. If the test bench has the absolute P1 and P3 pressure gages with adjustable dials, adjust the gage to indicate the current atmospheric pressure, or set the gages to zero if the gages indicate psig.

        2. Select the calibration curve on which the calibration point, or the intersection of the flow parameter and pressure ratio lines, is within the airflow test limits so that you can do a test on the cooling duct. Refer to the SPM TASK 70-72-01-720-501.

        3. From this curve, find the air holes in the master which must stay plugged to get the calibration point flow parameter and the pressure ratio.

        4. Remove the rubber stoppers as required, to change the master from the leak test configuration (with all the holes plugged) to the airflow test configuration (with only those holes plugged that are indicated on the calibration curve).

        5. NOTE

          The procedure is valid only if the acoustical damper causes an increase in pressure that is less than 0.1 psig (0.69 kPa) or 0.2 in. (5.08 mm) of Hg. Refer to the SPM TASK 70-72-01-720-501 for the requirement to measure the increase in pressure that is caused by the acoustical damaper.

          Install an acoustical damper around the master. Refer to the SPM TASK 70-72-01-720-501.

        6. CAUTION

          WHEN YOU FLOW LARGE QUANTITIES OF AIR IN A SMALL, CLOSED ROOM, YOU CAN PRESSURIZE THE ROOM. IN THIS SITUATION, A BAROMETER MUST BE PUT INTO THE ROOM. USE ROOM PRESSURE, NOT ATMOSPHERIC PRESSURE, FOR TEST CALCULATIONS.

          With the master mounted on the test bench, do a one-point test bench calibration. Refer to the SPM TASK 70-72-02-720-501.

        7. Remove the master and store it in its protective container.

      3. Set up and do an airflow check of the cooling duct.

      1. If the test bench has absolute pressure gages with adjustable dials, adjust the dials to indicate atmospheric pressure or set the gages to zero if the gages indicate psig.

        2. Mount the cooling duct on the IAE 2P16018 Airflow fixture 1 off as follows:

        1. Loosen the swing bolts then retain the fixture cover assembly.

        2. Install eyebolts into the lift-holes of the cover.

        3. Use a hoist and a three-cable sling to remove the cover assembly.

        4. Visually check the condition of the IAE 2P16018 Airflow fixture 1 off.

        5. Install the cooling duct onto the fixture.

        6. Use the fixture details to clamp the cooling duct in position.

        3. Do the air leak check each time you mount a cooling duct on the test fixture as follows:

        1. Install the IAE 2P16020 Leak test ring 1 off. Align the offset dowel pin hole in the ring with the dowel pin in the IAE 2P16018 Airflow fixture 1 off. Secure the ring with cap screws.

        2. Slowly open the valve to let air into the system. Pressurize the system to 16 psig (110.4 kPa) on the P3 pressure gage. Close the valve to isolate the system.

        3. Look at the P3 gage for a pressure decrease. The maximum acceptable rate of the pressure decrease in the isolated system is 7.0 psig (48.3 kPa) in 14 seconds.

        4. If the rate of pressure decrease if more than 7.0 psig (48.3 kPa) in 14 seconds, use CoMat 10-045 LEAK CHECK FLUID, BUBBLES-TYPE or a soap and water solution to find the source of the leak. The leaks must be repaired before you continue the airflow check.

        5. WARNING

          RELEASE ANY PRESSURE AT THE END OF THE TEST OR BEFORE YOU DO ANY REPAIRS. INJURY TO THE OPERATOR CAN OCCUR IF THE PRESSURE IS NOT RELEASED.

          Release the pressure in the system.

        6. Remove the IAE 2P16020 Leak test ring 1 off.

      4. NOTE

        The procedure is valid only if the acoustical damper causes an increase in pressure that is less than 0.1 psig (0.69 kPa) or 0.2 in. (5.08mm) of Hg. Refer to the SPM TASK 70-72-01-720-501 for the requirement to measure the increase in pressure that is caused by the acoustical damper.

        Install an acoustical damper around the cooling duct. Refer to the SPM TASK 70-72-01-720-501 for the installation procedure.

      5. CAUTION

        THE AIRFLOW MEASUREMENTS OF THE COOLING DUCT MUST BE ACCURATE. THE COOLING DUCT CONTROLS THE COOLING AIRFLOW TO THE ROTATING PARTS IN THE HPT. THIS AIRFLOW IS VERY IMPORTANT FOR THE DURABILITY OF THE PART, THE THRUST BALANCE ON THE NO. 3 BEARING, AND ENGINE PERFORMANCE.

        CAUTION

        WHEN YOU FLOW LARGE QUANTITIES OF AIR IN A SMALL, CLOSED ROOM, YOU CAN PRESSURIZE THE ROOM. IN THIS SITUATION, A BAROMETER MUST BE PUT INTO THE ROOM. USE ROOM PRESSURE, NOT ATMOSPHERIC PRESSURE, FOR TEST CALCULATIONS.

        Do an airflow check of the cooling duct. Use the airflow check limits given in Figure.

      6. Remove the cooling duct from the airflow fixture.

        7. Cooling ducts that are not within the limits

        1. Repair, VRS3177 TASK 72-44-50-300-010 (REPAIR-010)

    12. Figure: Stage 1 HPT Cooling Duct Inspection Locations

    Stage 1 HPT Cooling Duct Inspection Locations

    Figure: Stage 1 HPT Cooling Duct Inspection Location

    Stage 1 HPT Cooling Duct Inspection Location

    Figure: Stage 1 HPT Cooling Duct Installation on the IAE 6P16080 Airflow Test Bench

    Stage 1 HPT Cooling Duct Installation on the IAE 6P16080 Airflow Test Bench

    Figure: Stage 1 HPT Cooling Duct Airflow Check Limits

    Stage 1 HPT Cooling Duct Airflow Check Limits

    Figure: Stage 1 HPT Cooling Duct Airflow Check - Pressure Ratio Method

    Sheet 1

    Legend
    Stage 1 HPT Cooling Duct Airflow Check - Pressure Ratio Method

    Sheet 1

    Close

    Figure: Stage 1 HPT Cooling Duct Airflow Check - Pressure Ratio Method

    Sheet 2

    Legend
    Stage 1 HPT Cooling Duct Airflow Check - Pressure Ratio Method

    Sheet 2

    Close

    Figure: Stage 1 HPT Cooling Duct Inspection Locations

    Stage 1 HPT Cooling Duct Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:03530
Enterprise Name:AMERICAN GAS AND CHEMICAL CO LTD
BU Name:AMERICAN GAS AND CHEMICAL CO LTD
Street:220 PEGASUS AVE
City:NORTHVALE
State:NJ
Zip Code:07647
Country:USA
Phone Number:1-201-767-7300, 1-800-526-1008
Fax Number:1-201-767-1741
Internet:www.amgas.com
Manufacturer Code:0AM53
Enterprise Name:IAE INTERNATIONAL AERO ENGINES AG
BU Name:NULL
Building:SUITE 400
Street:628 HEBRON AVENUE
City:GLASTONBURY
State:CT
Zip Code:06033
Country:USA
Manufacturer Code:03530
Supply Number:CoMat 10-045
Type:sp01
Supply Short Name:CoMat 10-045 LEAK CHECK FLUID, BUBBLES-TYPE
Supply Name:CoMat 10-045 LEAK CHECK FLUID, BUBBLES-TYPE
Specification Groups:
Doc NumberType
LEAK TEC 372E
Suppliers:
ManufacturerRemarks
03530
Manufacturer Code:0AM53
Tool Number:IAE 2P16018
Tool Name:IAE 2P16018 Airflow fixture
Manufacturer Code:0AM53
Tool Number:IAE 2P16019
Tool Name:IAE 2P16019 Airflow adapter
Manufacturer Code:0AM53
Tool Number:IAE 2P16020
Tool Name:IAE 2P16020 Leak test ring
Manufacturer Code:0AM53
Tool Number:IAE 2P16021
Tool Name:IAE 2P16021 Airflow master
Manufacturer Code:0AM53
Tool Number:IAE 6P16080
Tool Name:IAE 6P16080 Test bench