SDR AALA201801029027

Service difficulty report · Flap System · Boeing 737823

Difficulty date: January 1, 2018
Submitted: January 4, 2018
Operation: Air carrier
Aircraft: N929NN
Make and model: Boeing 737823
Aircraft serial: 33322
Aircraft time: 14,997 hours, 6,073 cycles
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Flap System
Condition: Malfunctioned
Location: Te Flaps
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

SELECTED FLAPS 15, LEFT FLAP WENT TO 14, RIGHT FLAP TO 11. AFTER A FEW SECONDS BOTH FLAPS WERE AT 14. SELECTED FLAPS 25, FLAPS DID NOT MOVE. USED ALTERNATE FLAP EXTENSION, FLAPS DID NOT MOVE. THE FLIGHT DECLARED AN EMERGENCY AND LANDED WITHOUT FURTHER INCIDENT. PERFORMED OPERATIONAL CHECK AND BITE CHECK OF PSEU WITH NO FAULTS NOTED, LEFT FLAP TRANSMITTER WITH-IN LIMITS OF EACH OTHER, ALL WORK DONE PER FIM 27-58-01. OK FOR SERVICE. AIRCRAFT WAS GROUNDED.