SDR DHL96708007

Service difficulty report · Yaw Damper · Boeing 72725

Difficulty date: December 9, 1996
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N708DH
Make and model: Boeing 72725
Aircraft serial: 18275
System (JASC): 2210 · Autopilot System
Part: Yaw Damper
Part number: 25888801
Condition: Malfunctioned
Location: Rudder
Stage of operation: CR
Nature of condition: F
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AT FL 310 AND MACH .80, RECEIVED SUDDEN UNCOMMANDED RUDDER INPUTS FROM LOWER YAW DAMPER. WHEN YAW DAMPER SWITCH TURNED OFF, THE UNCOMMANDED RUDDER INPUTS CEASED. CLEANED LOWER YAW DAMPER CONNECTOR AND RERACKED COUPLER, CYCLED RUDDER TO FULL TRAVEL LEFT AND RIGHT SEVERAL TIMES, FOUND NO PROBLEM. OPS CHECK OK PER M/M 22-11-01.

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