Service difficulty report · Module · Boeing 737522

Difficulty date
August 12, 2001
Submitted
September 12, 2001
Operation
Air carrier
Aircraft
N921UA
Make and model
Boeing 737522
Aircraft serial
25388
Aircraft time
28,118 hours, 20,953 cycles
Engine
Ge CFM56*
Part
Module
Part number
65C2552921
Condition
Faulty
Location
Control Column
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

UNSCHEDULED LANDING DUE TO ELECTRICAL TRIM SYSTEM AND RELATED CIRCUIT BREAKER PROBLEMS. REPLACED COLUMN CUTOUT SWITCHING MODULE.