Service difficulty report · Control Module · Boeing 737401

Difficulty date
February 3, 2012
Submitted
February 6, 2012
Operation
Air carrier
Aircraft
N424US
Make and model
Boeing 737401
Aircraft serial
23991
Aircraft time
60,320 hours, 40,346 cycles
Part
Control Module
Part number
69737038
Part serial
D00623
Condition
Faulty
Location
Cockpit
Part time
36,490 hours, 24,707 cycles
Stage of operation
CR
How discovered
O
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 CRUISE, ON AUTO PILOT, CREW REPORTED THE LEFT FLIGHT CONTROL SURFACE DEPLOYED. AIRCRAFT WAS DIFFICULT TO CONTROL, CREW DECLARED AN EMERGENCY AND DIVERTED TO GSO. FLIGHT LANDED AND TAXIED TO THE GATE WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE AILERON/RUDDER TRIM CONTROL MODULE PER AMM 27-11-94. ALSO, REMOVED AND REPLACED AILERON FORCE LIMITER PER AMM 22-11-13. ALL SYSTEM OPS CHECKS GOOD.