# SDR 98ZZZX2987

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N9710F](https://openairdocs.org/aircraft/N9710F), registered now
- Make and model: Cessna 172R
- Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (OpenAirDocs)
- Aircraft serial: 17280017
- System (JASC): [2215 · Autopilot Main Servo](https://openairdocs.org/jasc/2215)
- Part: Servo
- Part number: 065000300000
- Condition: Malfunctioned
- Location: Autopilot
- Part time: 246 hours
- 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/98ZZZX2987

## Discrepancy

PILOT SQUAWKED GRINDING NOISE WHEN AILERON WAS MOVED UP AND DOWN.  WHEN TROUBLESHOOTING, FOUND NOISE COMING FROM SERVO.  WHEN OPERATING ON THE GROUND, LIGHT WOULD COME ON AND HORN WOUULD GO OFF SAYING THAT AUTOPILOT WAS DISENGAGED, EXCEPT SERVO OUT AT WING WAS STILL ENGAGED.  SOLENOID FOR AUTOPILOT TO DISENGAGE AND ENGAGE STICKING.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.