# SDR A6WA200540079

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 23, 2005
- Submitted: March 21, 2005
- Operation: Air carrier
- Aircraft: [N413AW](https://openairdocs.org/aircraft/N413AW), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7585
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Yaw Damper
- Part number: 6229968001
- Part serial: 2684
- Condition: Defective
- Location: Vertical Stab
- Stage of operation: DE
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/A6WA200540079

## Discrepancy

ON DESCENT THROUGH 9000 FEET, LOUD REPEATED BANGING SOUND FROM AIRCRAFT.  COMBINED WITH SHARP REPEATED LEFT YAW MOTIONS.  C/W SECU CHECKS, SPOILER AND SPOILERON CHECKS.  CHECKED HYD SYSTEM HEAT EXCHANGER.  CHECKED RUDDER AND RUDDER TRIM SYSTEM.  COMPLIED WITH ACCEL AND DECCEL ENGINE CHECKS AND C/W VIBE CHECKS.  FOUND INTERMITTENT FAILING YAW DAMP ACTUATOR NR 2.  REMOVED AND REPLACED YAW DAMP ACTUATOR NR 2.  (M)

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