Service difficulty report · Control Unit · Boeing 737924ER

Difficulty date
October 9, 2023
Submitted
October 11, 2023
Operation
Air carrier
Aircraft
N68891
Make and model
Boeing 737924ER
Aircraft serial
42196
Aircraft time
25,737 hours, 9,333 cycles
Part
Control Unit
Part number
UNKNOWN
Condition
Stuck
Location
Trim Sys
Stage of operation
CL
How discovered
O
Nature of condition
F, O
Precautionary procedure
A, B

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

What was found

CREW REPORTED PROBLEM MOVING STAB TRIM AND COMPLETED AN AIR RETURN, UPON ARRIVAL FOUND THAT STAB TRIM CONTROL (B10) ON THE P6-2 PANEL HAD BEEN PULLED AND COLLARED. MEL FOR AUTO SPEED BRAKE WAS ACCOMPLISHED LAST NIGHT, CB FOR AUTO SPEED BRAKE ON P6-2 (B9) WAS NOT PULLED AND COLLARED REF MEL LP 5974951. AUTO SPEED BRK AND SPEED BRK LOAD ALEVIATION MEL''S ON LP5975056 AND LP5974951 HAVE BEEN UP UPDATED WITH CORRECT C-B CONFIGURATION AND ADDED IPAD PICTURES. ACP''D VISUAL INSP OF JACKSCREW AREA, NO DISCREPANCIES FOUND. ACP''D BOTH MANUAL AND ELECTRIC HORIZONTAL STAB TRIM TESTS, STAB TRIM PASSED TESTS, FULL TRAVELS SMOOTH ANOMALIES. AMM 27-41-00-700-801, 27-41-00-700-803. SHOULD READ : FULL TRAVELS SMOOTH NO ANOMALIES.