# SDR 96ZZZX5485

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 15, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N4232T](https://openairdocs.org/aircraft/N4232T), registered now
- Make and model: Piper PA-28-235
- Registry model: [Piper PA-28-235](https://openairdocs.org/model/piper-pa-28-235) (OpenAirDocs)
- Aircraft serial: 287210005
- Engine: Lyc O540B4B5
- System (JASC): [8550 · Reciprocating Engine Oil System](https://openairdocs.org/jasc/8550)
- Part: Pump
- Part number: 78619
- Condition: Failed
- Location: Eng Oil
- Part time: 1,700 hours
- 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/96ZZZX5485

## Discrepancy

DURING OVERHAUL DISASSEMBLY OF OIL PUMP, DISCOVERED WOODRUFF KEY DRIVE SHAFT AND SINTERED IRON GEARS.  AD 75-08-09 REQUIRES REMOVAL OF THIS STYLE, BUT THIS SERIAL NUMBER IS OUTSIDE OF THOSE SPECIFIED BY LYCOMING.  AD 81-18-04 CALLS FOR REPLACEMENT AT 2,000 HRS OR AT ACCY CASE DISASSEMBLY FOR SINTERED IRON OIL PUMP IMPELLERS.  CURRENT AD 96-09-10 DOES SPECIFICY THIS ENGINE AS HAVING SINTERED IRON, BUT THIS STYLE OF DRIVE SHOULD HAVE BEEN REPLACED PER 75-08-09.

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