SDR AALA202205230077

Service difficulty report · Sensor · Boeing 737

Difficulty date: May 19, 2022
Submitted: May 23, 2022
Operation: Air carrier
Aircraft: N809NN
Make and model: Boeing 737
Aircraft serial: 33519
Aircraft time: 38,260 hours, 15,592 cycles
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Sensor
Condition: Inoperative
Location: Zone 500 - Lh Wi
Stage of operation: DE
How discovered: V
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: DURING ARRIVAL PHASE FLAP ASYMMETRY NOTED IN FLIGHT. FLAPS AND SLATS FAILED TO EXTEND ON ARRIVAL. EMERGENCY WAS DECLARED LANDED WITH LEADING EDGE FLAPS EXTENDED. TRAILING EDGE UP PER QUICK REFERENCE HANDBOOK. ACCOMPLISHED BUILT IN TEST EQUIPMENT OF FLAP SLAT ELECTRONIC UNIT, FAULTS "27-53252 FLAP 3 SKEW". REPLACED FLAP 3 SKEW SENSOR, PER AMM 27-59-01, OPERATIONS CHECK NORMAL.