# SDR 97ZZZX5113

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 19, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [Lufthansa Technik Engine Services, Inc, repair station IY2R915K](https://openairdocs.org/faa-repair-station/IY2R915K/lufthansa-technik-engine-services-inc.md) (OpenAirDocs)
- Engine: Garrtt TFE731*
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Retainer Seal
- Part number: 30756432
- Condition: Misidentified
- Location: Hp Comp Nr 5
- Stage of operation: IN
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX5113

## Discrepancy

DURING INSTALLATION OF SB 72-3596 R5 (REPLACEMENT OF MAIN SHAFT CARBON SEALS AND ASSOCIATED COMPONENTS), MECHANIC FOUND THE NR 5 SEAL RUNNER RETAINER PN 3075635-2 WAS IDENTIFIED AS PN 3075643-2.  THIS PART NUMBER IS FOR THE NR 4 SEAL RUNNER RETAINER.  INSPECTION STAMP ADJACENT TO PART NUMBER IS 16/868.  THIS SERVICE BULLETIN IS VERY COMPLEX AND IS HARD TO ID PARTS WITHOUT CURRENT PART NUMBER.  SUBMITTER STATED ALLIED SIGNAL MUST DO A BETTER JOB WITH SUPERVISION AND TRAINING OF THEIR INSPECTION PERSONNEL.  PART HAS BEEN RETURNED TO ALLIED SIGNAL, PHX.

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