Service difficulty report · Flap System · Boeing 737824

Difficulty date
September 4, 2024
Submitted
September 5, 2024
Operation
Air carrier
Aircraft
N78511
Make and model
Boeing 737824
Aircraft serial
33459
Aircraft time
53,127 hours, 18,704 cycles
Part
Flap System
Condition
Faulted
Stage of operation
DE
How discovered
O
Nature of condition
F, J
Precautionary procedure
O

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

What was found

ON APP FLAP ASSYMETRY WHEN SEL F25. TURNED INTO A FLAP DISS F15- 25 AFTER LNDG FLAPS SHOW15 AHM UPDATE: CHIME ALERT FOR THE BYPASS. SEE ATTACHED REPORT. PERFORMED FSEU BITE. LAST LEG FAULT HISTORY SHOWED TE FLAPS SNSR FIM REF 27-51 TASK 819 RECOMMENDS CHANGING FLAP CONTROL LEVER DIS FAULT CODE 27-52261. CURRENT FAULTS SHOWED FLAP LEVER FAULT POSITION SENSOR. REF TASK 27-51-06-400-802 CODE 27-51427. PERFORMED TRAILING EDGE FLAP LOAD RELIEF GROUND TEST. FLAP LEVER FAULT 27-51427 REMAINS. ADD FAULT: 27-51427 FOUND FLAP INHIBIT SWITCH OUT OF NORMAL CONFIGURATION. RETURNED 27-51 TASK 819, FIM 27-51 TASK 803 INHIBIT SWITCH TO NORMAL. REACCOMPLISHED TRAILING EDGE FLAP LOAD RELIEF GROUND TEST. TEST PASSED, MSG CLEARED. CYCLED FLAPS, PERFORMED FSEU BITE. NO FAULTS FOUND. OPS CHECK OK. REF FIM ADD EMP:181284 NO PARTS WERE REPLACED.