# SDR AALA20091223BOS01

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2009
- Submitted: June 29, 2010
- Operation: Air carrier
- Aircraft: N495AA
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49733
- Aircraft time: 59,779 hours, 31,241 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Yaw Damper
- Part number: 2589445933
- Condition: Failed
- Location: Rudder
- Stage of operation: CL
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20091223BOS01

## Discrepancy

CREW REPORTED AIRCRAFT YAWING SIGNIFICANTLY.  INHIBITED YAW DAMPER AND DE-PRESSURIZED RUDDER SYSTEM.  RETURNED TO BOS AND LANDED WITHOUT INCIDENT.  REPLACED YAW DAMPER ACTUATOR.

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