SDR ASMF2020090709

Service difficulty report · Flap System · Boeing 737852

Difficulty date: July 10, 2020
Submitted: September 7, 2020
Operation: Air carrier
Aircraft: N950AM
Make and model: Boeing 737852
Aircraft serial: 35115
Aircraft time: 53,036 hours, 20,279 cycles
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Flap System
Condition: Malfunctioned
Stage of operation: AP
How discovered: O
Nature of condition: F
Precautionary procedure: O

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

What was found

CAPTAIN REPORTED THAT DURING APPROACH THE FLAPS WERE NOT OPERATING CORRECTLY, REMAINING IN FLAPS 10 WHEN THE LEVER WAS PUT ON FLAPS 15. MAINTENANCE PERSONNEL PERFORMED BITE TO FSEU IAW FIM 27-51 TASK 803 PROCEDURE, SHOWING FAILURE CODES 27-81224, 27-81203, 27-52260. THE FIM PROCEDURE LEADING EDGE FLAPS AND SLAT FAIL TO OPERATE DURING NORMAL SYSTEM OPERATION WAS PERFORMED IAW FIM 27-81 TASK 803 PROCEDURE, NO CONFIRMING FAILURE, TESTED CORRECT.