SDR AALA202208011176

Service difficulty report · Control Unit · Boeing 737

Difficulty date: July 30, 2022
Submitted: August 1, 2022
Operation: Air carrier
Aircraft: N925AN
Make and model: Boeing 737
Aircraft serial: 29526
Aircraft time: 63,994 hours, 26,314 cycles
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Control Unit
Condition: Faulty
Location: Zone 200 - Fuse
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

AIRCRAFT WAS GROUNDED: ON APPROACH INTO CUR FLAPS FAILED TO EXTEND NORMALLY. USED ALTERNATE EXTENSION AND LANDED FLAPS 15 DEGREE. EMERGENCY WAS DECLARED. ACCOMPLISHED BUILT IN TEST EQUIPMENT OF FLAP SLAT ELECTRONIC UNIT. FAULTED NUMBER 8 PROXIMITY SENSOR. (RIGHT OUT BOARD). REPLACED NUMBER 8 PROXIMITY SENSOR (AALA202208013849). THEN PER FIM,REPLACED THE FLAP SLAT ELECTRONIC UNIT (AALA202208011176). OPERATIONS CHECKS NORMALLY ON GROUND.