SDR 753003

Service difficulty report · Yaw Damper · Boeing 747228F

Difficulty date
September 14, 2007
Submitted
September 15, 2007
Operation
Air carrier
Aircraft
N753SA
Make and model
Boeing 747228F
Aircraft serial
21787
Aircraft time
111,379 hours, 21,756 cycles
Part
Yaw Damper
Part number
19642122
Part serial
7403101
Condition
Faulty
Location
Rudder
Stage of operation
CR
How discovered
O
Nature of condition
F
Precautionary procedure
J, A

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

What was found

HAD SEVERAL HARD RUDDER KICKS. FOUND THAT SHUTTING DOWN LOWER YAW DAMPER PROBLEM WENT AWAY. DEFERRED ITEM IN ACCORDANCE WITH DDPG PROCEDURES 22-3. REMOVED AND REPLACED LOWER YAW DAMPER COMPUTER IN ACCORDANCE WITH AMM 22-16-02. OPERATIONAL CHECK GOOD. DEFERRAL CLOSED.