SDR AALA202601142239

Service difficulty report · Sensor · Boeing 737823

Difficulty date: January 13, 2026
Submitted: January 14, 2026
Operation: Air carrier
Aircraft: N899NN
Make and model: Boeing 737823
Aircraft serial: 31151
Aircraft time: 40,038 hours, 17,314 cycles
System (JASC): 2751 · Trailing Flap Position Indicating System
Part: Sensor
Part number: 90004212
Condition: Faulty
Location: Zone 600 Flaps
Stage of operation: AP
How discovered: O
Nature of condition: J
Precautionary procedure: A

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

What was found

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING APPROACH FLAP GAGE SHOWED FLAP ASYMMETRICINDICATION, CYCLED HANDLE BUT NO MOVMENT ON THE GAGE. AIRCRAFT EMERGENCY LANDED SAFELY AT ORD. REMOVE AND REPLACED NUMBER 5 INBOARD FLAP INBOARD SKEW SENSOR (AALA202601142239),OPERTIONAL CHECK GOOD, PER AMM 27-59-01. ALSO, REMOVE AND REPLACED NUMBER 5 INBOARD FLAP INBOARD SKEW SENSOR'S CONNECTOR (AALA202601140298) (D11822), OPERATIONAL CHECK GOOD, PER SWPM 20-61-11 AND WDM 27-53-21.