# SDR CA021223001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 21, 2002
- Submitted: January 21, 2003
- Operation: Air carrier
- Make and model: Lkheed 382G
- Aircraft time: 31,584 hours
- Engine: Allsn 501D22A
- Propeller: Hamstd 54H60117
- System (JASC): [6120 · Propeller Controlling System](https://openairdocs.org/jasc/6120)
- Part: Housing
- Part number: 582855
- Condition: Failed
- Location: Prop Valve
- Stage of operation: DE
- How discovered: O
- Nature of condition: R
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA021223001

## Discrepancy

(CAN) ON DESCENT 175 MILES SOUTH OF YZF NR 3 ENGINE RPM DROPPED BELOW 98 PERCENT WITH FLUCTUATION 0.5 PERCENT OUTSIDE LIMITS. WITH ADVANCE OF NR 3 THROTTLE FOR PITCH LOCK CHECK RPM DECAYED. ENGINE PUT TO BED. PROPELLOR VALVE HOUSING DETERMINED TO BE FAULTY, UNIT REPLACED GROUND RUN FOR PITCHLOCK CHECK CARRIED OUT, SYSTEM SERVICEABLE.

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