# SDR 96ZZZX2410

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 7, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N215MP](https://openairdocs.org/aircraft/N215MP), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C1231
- Engine: Cont GTSIO520H
- System (JASC): [8540 · Reciprocating Engine Rear Section](https://openairdocs.org/jasc/8540)
- Part: Shaft
- Part number: 99101371
- Condition: Sheared
- Location: Rt Eng Hyd
- 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/96ZZZX2410

## Discrepancy

FOUND DRIVE SHAFT ON AIR CONDITIONING, HYDRAULIC PUMP SHEARED.  UPON REMOVAL, SYSTEM HYDRAULIC PUMP SHAFT SPLINES WERE FOUND WORN OUT AND RUSTED.  SUBMITTER SUGGESTS SPLINES BE LUBED AT 200-HOUR INTERVALS TO PREVENT THIS PROBLEM FROM RECURRING.

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