TASK 72-45-00-200-801 HP Turbine (HPT) Rotor And Stator Assembly - Examine The HPT After Possible Oil Ignition Event, Inspection-001

DMC:V2500-A0-72-45-0000-00A-300A-B|Issue No:004.00|Issue Date:2017-08-01

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 72-45-00-200-801 HP Turbine (HPT) Rotor And Stator Assembly - Examine The HPT After Possible Oil Ignition Event, Inspection-001

General

This TASK gives the procedure for the inspection of the HPT for a possible oil ignition event.

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

This inspection is necessary when one of the following events occur:

Necessary if stated in All Ops Wire (AOW) 1046. Engines that are listed in AOW 1046 that had an IFSD and have not incorporated SBE 72-0351 (A1 engines), SBE 72-0190 (A5 engines) and SBE 72-120, which cannot borescope the stage 1 HPT metering plugs as given in SBE 72-0349. Only A1 engines with the Pre SBE 72-123 plugs can qualify for borescope inspection. Refer to SBE 72-0349.

Oil was found in the turbine exhaust case that came from the No. 4 bearing oil weep tube outlet. Refer to TASK 72-00-50-220-004 for inspection of the tube outlet in the TEC.

Oil consumption is more than 0.3 Qts/hour which is due to internal leakage from the No. 4 compartment or No. 4 oil service tubes or of an unknown origin.

Oil leaks from the No. 4 compartment or associated plumbing. Refer to SBE 72-0419.

The High Pressure Turbine appears black and sooty.

Blocked anti-weep groove and related drain oil holes in No. 4 Bearing Front Seal Seat Section 72-43-11 or No. 4 Bearing Rear Seal Seat Section 72-43-14.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Balancing fixtureLOCALBalancing fixture

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-45-00-220-172 Examine the HPT After Possible Oil Ignition Event

      CAUTION

      MAKE SURE THAT YOU DO THIS INSPECTION BEFORE YOU CLEAN THE PART OR CLEANING WILL REMOVE INDICATION OF SOOT AND OIL.

      1. Examine the HPT Rotor and Stator Assembly front face at interface M-45. Refer to TASK 72-00-45-220-002-A00 (INSPECTION-002), TASK 72-00-45-220-002-B00 (INSPECTION-002), TASK 72-00-45-220-002-C00 (INSPECTION/-002) or TASK 72-00-45-220-002-D00 (INSPECTION-002).

      1. Examine the cooling air holes of the inner seal for signs of soot and oil. If soot and oil found, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      2. Examine the TOBI seal inner diameter for signs of soot and oil. If soot and oil found, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      3. Report all rejections or unusual findings to IAE Technical Services.

      2. Examine the Stage 2 HPT Air Seal. Refer to TASK 72-45-00-200-000 (INSPECTION-000).

      1. Examine and make a record of the results of the bore drop dimensional inspection, crack inspection, dimensional inspection, wear marks on the bore surface and metering plug inspection (if applicable).

      2. If wear marks found on the bore surface, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      3. If you reject the Stage 2 Seal for the bore drop dimension measurement, then you must reject the Stage 1 and 2 HPT Hubs, Stage 1 HPT inner and outer air seals and the Stage 2 Retaining Plate.

      4. Examine the seal for signs of soot or oil. If soot and oil found, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      5. Report all rejections or unusual findings to IAE Technical Services.

      3. Examine the Stage 1 Rotor Assembly. Refer to TASK 72-45-10-220-001-A00 (INSPECTION-001) or TASK 72-45-10-220-001-B00 (INSPECTION-001).

      1. Examine the Stage 1 HPT Rotor Assembly (make sure to include the stage 1 inner and outer air seal) for soot or oil. If soot and oil found, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      2. If wear marks found on the rear hub surface, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      3. Report all rejections or unusual findings to IAE Technical Services.

      4. Examine the Stage 1 Disk metering plug, if applicable. Refer to TASK 72-45-10-220-001-A00 (INSPECTION-001) or TASK 72-45-10-220-001-B00 (INSPECTION-001).

      1. Visually examine the metering plugs for damage or distress.

      2. Report all rejections or unusual findings to IAE Technical Services.

      5. Examine the Stage 1 HPT Hub. Refer to TASK 72-45-11-200-000 (INSPECTION-000).

      1. Examine and make a record of the results of the crack inspection, dimensional inspection and wear marks on the rear hub surface.

      2. If wear marks found on the rear hub surface, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      3. Examine the hub for signs of soot or oil. If soot and oil found, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      4. Report all rejections or unusual findings to IAE Technical Services.

      6. Examine the Stage 2 Rotor Assembly. Refer to TASK 72-45-30-220-001-A00 (INSPECTION-001) or TASK 72-45-30-220-001-B00 (INSPECTION-001).

      1. Examine the Stage 2 HPT Rotor Assembly (make sure to include the heat shield) for soot or oil. If soot and oil found, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      2. If wear marks found on the front hub surface, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      3. Report all rejections or unusual findings to IAE Technical Services.

      7. Examine the Stage 2 HPT Hub. Refer to TASK 72-45-31-200-000 (INSPECTION-000).

      1. Examine and make a record of the results of the crack inspection, dimensional inspection and wear marks on the front hub surface.

      2. If wear marks found on the front hub surface, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      3. Examine the hub for signs of soot or oil. If soot and oil found, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      4. Report all rejections or unusual findings to IAE Technical Services.

      8. Examine the Stage 2 HPT Heat Shield. Refer to TASK 72-45-31-200-000 (INSPECTION-000).

      1. Examine and make a record of the results of the crack inspection, dimensional inspection and surface wear.

      2. Carefully examine for distortion and heat distress.

      3. Check the rivets for distress.

      4. Examine the heat shield for signs of soot or oil. If soot and oil found, perform hardness check per TASK 72-45-31-200-006.

      5. Report all rejections or unusual findings to IAE Technical Services.

      9. Examine the Stage 1 HPT inner air seal. Refer to TASK 72-45-13-200-000 (INSPECTION-000).

      1. Examine and make a report of the results of the crack inspection and dimensional inspection.

      2. Examine the seal for signs of soot and oil. If soot and oil found, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      3. Report all rejections or unusual findings to IAE Technical Services.

      10. Examine the Stage 1 HPT outer air seal. Refer to TASK 72-45-12-200-000 (INSPECTION-000).

      1. Examine and make a report of the results of the crack inspection and dimensional inspection.

      2. Examine the seal for signs of soot and oil. If soot and oil found, perform hardness check of HPT Stage 2 Heat Shield per TASK 72-45-31-200-006.

      3. Report all rejections or unusual findings to IAE Technical Services.

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure. (17VC068)

Change Type:

Revised the procedure to correct coil to oil. (17VC213)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Balancing fixture
Tool Name:Balancing fixture