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 72-50-41-200-001 LPT Rear Lock Nut - Examine, Inspection-001
General
This TASK gives the procedure for the inspection of the rear lock nut. For the other LP turbine shaft parts, refer to TASK 72-50-41-200-000 (INSPECTION-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 70-20-01-200-501.
All the parts must be cleaned before any part is examined. Refer to TASK 72-50-41-100-000 (CLEANING-000).
All the 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. 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.
A ** following repair referenced in this inspection indicates that the repair is not yet published in the current revision of the manual and the part must be rejected. Contact IAE for additional information concerning FAA approved repair date.
All the 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.
Definition of Damages, SPM TASK 70-02-02-350-501
Inspection of Parts, SPM TASK 70-20-01-200-501
Some data on these items are 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
NONESupport Equipment
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| Magnetic particle inspection equipment | LOCAL | Magnetic particle inspection equipment |
Consumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 06-011 MAGNETIC PARTICLES, FLUORESCENT, DRY POWDER | LOCAL | CoMat 06-011 |
Spares
NONESafety Requirements
NONEProcedure
Clean the parts. Refer to TASK 72-50-41-100-000 (CLEANING-000).
Do the test for cracks on the parts that are given below. Use the applicable penetrant procedure.
PART IDENT PROCEDURE CURRENT/INSPECT TASK/OP
Rear lock
TB using
continuous wet
simultaneous
inking with
500 amp
Shaft outside
diameter visually
inspect for
longitudinal and
radial defects.
Check doubtful
indications using
low power
magnification.
If necessary,
inspect under
white light at
15X binocular
1-turn
600 A/T
solenoid
Do again the
continuous.
magnetisation and
wet or
inspection along
simultaneous
shaft length.
inking
Visually inspect
for circumferential
defects.
Check doubtful
indications using
low power
magnification.
If necessary, inspect
under white light at
15X binocular
SUBTASK 72-50-41-240-057 Examine the Rear Lock Nut (01-060) for Cracks
Refer to: Figure
Repair, VRS1483 TASK 72-50-41-300-016 (REPAIR-016)
Up to 0.010in. (0.25 mm) in depth
Scored.
Examine the outside diameter at location 1.
SUBTASK 72-50-41-220-078 Examine the Rear Lock Nut (01-060) Outside Diameter
Refer to: Figure
Repair, VRS1483 TASK 72-50-41-300-016 (REPAIR-016)
Repair, VRS1483 TASK 72-50-41-300-016 (REPAIR-016)
Up to 0.010in. (0.25 mm) in depth
Repair, VRS1483 TASK 72-50-41-300-016 (REPAIR-016)
Up to 0.010in. (0.25 mm) in depth
Burrs
Examine the slots at location 2.
SUBTASK 72-50-41-220-079 Examine the Rear Lock Nut (01-060) Slots
Refer to: Figure
Repair, VRS1483 TASK 72-50-41-300-016 (REPAIR-016)
Up to 0.003in. (0.07 mm) in depth if not more than 30 per cent of circumference of the contact area damaged
Galled.
Repair, VRS1483 TASK 72-50-41-300-016 (REPAIR-016)
Up to 0.003 in. (0.07 mm) in depth
Scored.
Repair, VRS1483 TASK 72-50-41-300-016 (REPAIR-016)
Raised metal
Examine the mating surface at location 3.
SUBTASK 72-50-41-220-080 Examine the Rear Lock Nut (01-060) Mating Surface
Refer to: Figure
Repair, VRS1483 TASK 72-50-41-300-016 (REPAIR-016)
Pick-up
Examine the threads at location 4.
SUBTASK 72-50-41-220-081 Examine the Rear Lock Nut (01-060) Thread
Refer to: Figure
Repair, VRS1488 TASK 72-50-41-300-018 (REPAIR-018)
Missing black oxide surface protection
Examine all the surface.
SUBTASK 72-50-41-220-082 Examine the Rear Lock Nut (01-060) Surface
Figure: Locations on the rear lock nut
Locations on the rear lock nut
