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 71-00-00-810-025 Inspections Of Engines Removed For N1 Overspeed, Fault lsolation-025
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
NONEConsumables, Materials and Expendables
NONESpares
NONESafety Requirements
NONEProcedure
Examine the Annulus Fillers. Refer to TASK 72-31-11-200-001-A00, TASK 72-31-11-200-001-B00 and TASK 72-31-11-200-001-C00.
Examine the Fan Blades. Refer to TASK 72-31-11-200-002-A00, TASK 72-31-11-200-002-B00, TASK 72-31-11-200-002-C00, TASK 72-31-11-200-002-D00, TASK 72-31-11-200-002-E00, TASK 72-31-11-200-002-F00, TASK 72-31-11-200-002-G00 and TASK 72-31-11-200-002-H00.
Examine the Fan Blade Rear Retaining Ring. Refer to TASK 72-31-12-200-001-A00 and TASK 72-31-12-200-001-B00.
Examine the Fan Disk. Refer to TASK 72-31-12-200-002.
Examine the Fan Blade Front Retaining Ring. Refer to TASK 72-31-13-200-001-A00 and TASK 72-31-13-200-001-B00.
Examine the LP Stub Shaft. Refer to TASK 72-32-51-200-004.
Examine the LPC Disc. Refer to TASK 72-32-81-200-001-A00 and TASK 72-32-81-200-001-B00.
Examine the LPC Stage 2.5 Blades. Refer to TASK 72-32-82-200-001-A00, TASK 72-32-82-200-001-B00 and TASK 72-32-82-200-001-C00.
Examine the LPC Stage 2.0 Blades. Refer to TASK 72-32-82-200-002-A00, TASK 72-32-82-200-002-B00 and TASK 72-32-82-200-002-C00.
Examine the LPC Stage 1.5 Blades. Refer to TASK 72-32-82-200-003-A00, TASK 72-32-82-200-003-B00 and TASK 72-32-82-200-003-C00.
Examine the LPC Stage 2.3 Blades. Refer to TASK 72-32-82-200-004.
Examine the Fan Case Attrition Lining for excessive rubbing. Refer to TASK 72-32-85-200-001-A00, TASK 72-32-85-200-001-B00, TASK 72-32-85-200-001-C00 and TASK 72-32-85-200-001-D00.
Examine the Inlet Cone Assembly. Refer to TASK 72-38-11-200-002-A00 and TASK 72-38-11-200-002-B00.
Examine the Inlet Cone Fairing. Refer to TASK 72-38-11-200-001-A00 and TASK 72-38-11-200-001-B00.
Examine the LPT Shaft. Refer to TASK 72-50-41-200-003-A00 and TASK 72-50-41-200-003-B00.
Examine LPT Stage 3 Disk. Refer to TASK 72-50-31-200-005-A00, TASK 72-50-31-200-005-B00 and TASK 72-50-31-200-005-C00.
Examine LPT Stage 4 Disk. Refer to TASK 72-50-31-200-004.
Examine LPT Stage 5 Disk. Refer to TASK 72-50-31-200-003-A00, TASK 72-50-31-200-003-B00 and TASK 72-50-31-200-003-C00.
Examine LPT Stage 6 Disk. Refer to TASK 72-50-31-200-002-A00.
Examine LPT Stage 7 Disk. Refer to TASK 72-50-31-200-001-A00, TASK 72-50-31-200-001-B00, TASK 72-50-31-200-001-C00 and TASK 72-50-31-200-001-D00.
Examine LPT Stage 3 Rotating Air Seal. Refer to TASK 72-50-33-200-005.
Examine LPT Stage 4 Rotating Air Seal. Refer to TASK 72-50-33-200-004-A00 and TASK 72-50-33-200-004-B00.
Examine LPT Stage 5 Rotating Air Seal. Refer to TASK 72-50-33-200-003-A00 and TASK 72-50-33-200-003-B00.
Examine LPT Stage 6 Rotating Air Seal. Refer to TASK 72-50-33-200-002.
Examine LPT Stage 7 Rotating Air Seal. Refer to TASK 72-50-33-200-001-A00 and TASK 72-50-33-200-001-B00.
Examine LPT Stage 6 Inner Air Seal. Refer to TASK 72-50-00-200-005-A00, TASK 72-50-00-200-005-B00 and TASK 72-50-00-200-005-C00.
Examine LPT Stage 3 Outer Shroud Seal Segment. Refer to TASK 72-50-23-200-004-A00, TASK 72-50-23-200-004-B00, TASK 72-50-23-200-004-C00, TASK 72-50-23-200-004-D00, TASK 72-50-23-200-004-E00, TASK 72-50-23-200-004-G00, TASK 72-50-23-200-004-F00 and TASK 72-50-23-200-004-H00.
Examine LPT Stage 4 Outer Shroud Seal Segment. Refer to TASK 72-50-23-200-003-A00, TASK 72-50-23-200-003-B00, TASK 72-50-23-200-003-C00 and TASK 72-50-23-200-003-D00.
Examine LPT Stage 5 Outer Shroud Seal Segment. Refer to TASK 72-50-23-200-002-A00, TASK 72-50-23-200-002-B00, TASK 72-50-23-200-002-C00, TASK 72-50-23-200-002-D00.
Examine LPT Stage 7 Outer Shroud Seal Segment. Refer to TASK 72-50-23-200-001.
For an overspeed of 103 percent N1 or more you must remove and disassemble the engine and complete the TASKs that follow:
Inspect (LP) Turbine Outer Static Seals for unusual rub-in of honeycombs. In case of unusual rub-in, do full piece part inspection on the whole set of affected (LP) Turbine Blades per engine manual.
Inspections for Engines Removed for N1 Overspeed