SDR AALA202111031919

Service difficulty report · Pseu · Boeing 737823

Difficulty date: November 1, 2021
Submitted: November 3, 2021
Operation: Air carrier
Aircraft: N825NN
Make and model: Boeing 737823
Aircraft serial: 31087
Aircraft time: 35,559 hours, 14,513 cycles
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Pseu
Condition: Faulty
Location: Zone 100
Stage of operation: AP
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 APPROACH WHEN FLAPS SET TO 1, LE FLAP TRANSIT LIGHT STAYED ON AND FLAP INDICATOR SHOWED LESS THAN 1 DEGREE WHILE LE DEVICE INDICATORS ON OVERHEAD PANEL SHOWED ALL DEVICES EXTENDED; PERFORMED QRH PROCEDURES AND LANDED UNEVENTFULLY, PROXIMITY SWITCH ELECTRONICS UNIT LIGHT ILLUMINATED AFTER LANDING. REPLACED PSEU WITH SERVICEABLE UNIT IAW WORKCARD 08L00032003, OPS CHECK GOOD.