# SDR A6WA201542859

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2015
- Submitted: June 22, 2015
- Operation: Air carrier
- Aircraft: [N427ZW](https://openairdocs.org/aircraft/N427ZW), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7685
- Aircraft time: 30,437 hours, 29,098 cycles
- System (JASC): [2220 · Speed-Attitude Correction System](https://openairdocs.org/jasc/2220)
- Part: Actuator
- Condition: Malfunctioned
- Location: Yaw Damper
- Stage of operation: CR
- 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/A6WA201542859

## Discrepancy

FLIGHT 3771, 3990, 3763 INTERMITTENT UNCOMMANDED YAW MOTION IN CRUISE FLIGHT  
WITH AUTO PILOT ON OR OFF.  YD1 DISCONNECTED SEVERAL TIMES BUT NOT DURING UNCOMMANDED YAW MOTION.  R & R YAW DAMP ACTUATOR IAW AMM 22-22-01.  OPERATIONS CHECKED GOOD.

---
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.