# SDR 99ZZZX2391

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [AAR Allen Services Inc, repair station OB2R051L](https://openairdocs.org/faa-repair-station/OB2R051L/aar-allen-services-inc.md) (OpenAirDocs)
- Engine: Pwa JT8*
- System (JASC): [8550 · Reciprocating Engine Oil System](https://openairdocs.org/jasc/8550)
- Part: Scavenge Pump
- Part number: RD4002
- Condition: Seized
- Location: Oil System
- Part time: 95 hours
- Component: 735511A
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX2391

## Discrepancy

A PIECE OF METAL LODGED IN THE SCAVENGE PUMP CAUSING SEIZURE.  THE SCAVENGE PUMP SEIZURE CAUSED HIGH OIL TEMPERATURE.  THE PIECE OF METAL IN THE SCAVENGE PUMP WAS A GEAR TOOTH WHICH HAD SEPARATED FROM THE CHARGE PUMP GEAR.  THIS GEAR HAS BEEN SENT TO A LAB TO DETERMINE CAUSE OF FAILURE.  ONCE THE CAUSE HAD BEEN DETERMINED, WILL BE ABLE TO STATE POSSIBLE CAUSE AND RECOMMENDATIONS TO PREVENT RECURRENCE.  THIS IS A PMA GEAR MANUFACTURED BY ROGERS - DIERKS INC., FOR REPLACEMENT OF SUNDSTRAND, P/N 641833.

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