# SDR QXEA2009010500001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2009
- Submitted: January 5, 2009
- Operation: Air carrier
- Aircraft: N401QX
- Make and model: Bombdr DHC8402
- Aircraft serial: 4031
- Aircraft time: 19,288 hours, 19,671 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Yaw Damper
- Condition: Unknown
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QXEA2009010500001

## Discrepancy

ACFT WAS EXPERIENCING A SLIGHT NOSE LT NOSE RT OSCILLATION DURING CLIMB AND CRUISE.  PFCS SHOWED MINOR OSCILLATIONS OF RUDDER ALSO.  TURNING OFF YAW DAMPER, RIGHT TO LEFT MOVEMENT OF ACFT STOPPED .  PERFORMED OPS TESTS OF THE YAW DAMPER ACTUATOR IAW AMM TASK 22-11-36-710-801 OBSERVING PFCS AND INTEGRATED CDS.  ALL TESTS ARE GOOD.  RETURNED TO SERVICE.  NO PARTS REPLACED.

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