# SDR DL73K992170

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 28, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N310DA](https://openairdocs.org/aircraft/N310DA), registered now
- Make and model: Boeing 737232
- Aircraft serial: 23082
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Yaw Damper
- Condition: Malfunctioned
- Location: E&E Comp
- Component: 654486112
- Stage of operation: CR
- Nature of condition: F
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DL73K992170

## Discrepancy

UNCOMMANDED ROLL/YAW AT 31000 FT, 77 MACH AUTOPILOT ENGAGED, A/C ROLLED HARD LEFT.  REQUIRED 40-50 DEGREE AILERON TO TO RIGHT TO COUNTER COMMAND ROLL. POM COMPLIED WITH YAW DAMPER DISENGAGED.  A/C RETURNED TO NORMAL FLIGHT.  REPLACED YAW DAMPER COUPLER AND RUDDER PCU PER M/M.  REMOVED AND REPLACED FLIGHT DATA RECORDER FOR INVESTIGATION.

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