# SDR 2011FA0000638

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 29, 2011
- Submitted: September 29, 2011
- Operation: General aviation
- Aircraft: [N35475](https://openairdocs.org/aircraft/N35475), registered now
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Aircraft serial: 318052023
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autopilot Sys
- Part number: 91000013001
- Condition: Malfunctioned
- Location: Zone 100
- Stage of operation: AP
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2011FA0000638

## Discrepancy

AUTOPILOT. COUPLED APPROACHES RESULT ERRATIC ROLL HUNTING AND/OR OVERCORRECTION AND PITCH UNSTABILITY.

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