# SDR AU990946

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Piper PA-31
- Registry model: [Piper PA-31](https://openairdocs.org/model/piper-pa-31) (OpenAirDocs)
- Engine: Lyc TIO540A2C
- Propeller: Hartzl HCC3YR2
- System (JASC): [6120 · Propeller Controlling System](https://openairdocs.org/jasc/6120)
- Part: Nut
- Part number: MS210453
- Condition: Worn
- Location: Prop Control
- Stage of operation: CL
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU990946

## Discrepancy

(AUS) PITCH CONTROL ROD END LOCKNUT VIBRATED LOOSE CAUSING DISCONNECTION OF THE PITCH CONTROL CABLE.  INVESTIGATION FOUND THE LOCKING FUNCTION ON THE NUT WAS NON-EXISTENT.

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