# SDR AU000430

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2000
- Submitted: July 4, 2000
- Operation: General aviation
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Engine: Lyc TIO540J2BD
- Propeller: Hartzl HCE3YR2
- System (JASC): [2211 · Autopilot Computer](https://openairdocs.org/jasc/2211)
- Part: Diode
- Part number: BZX5111
- Condition: Incorrect
- Location: Autopilot Comput
- Component: Autopilot Comput, Century, IC151
- Stage of operation: IN
- How discovered: V
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU000430

## Discrepancy

(AUS) ROLL AMPLIFIER POWER SUPPLY ZENER DIODE INCORRECT PART.  DIODE CAUSED DRIVER TRANSISTOR TO FAIL.  UNAPPROVED PART.

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