SDR AALA202511246778

Service difficulty report · Antenna · Boeing 737823

Difficulty date: November 22, 2025
Submitted: November 24, 2025
Operation: Air carrier
Aircraft: N987NN
Make and model: Boeing 737823
Aircraft serial: 33247
Aircraft time: 27,352 hours, 11,860 cycles
System (JASC): 3444 · Ground Proximity System
Part: Antenna
Condition: Faulty
Location: Zone 100
Stage of operation: CR
How discovered: O
Nature of condition: J
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: IN FLIGHT WITH SPEED BRAKES DEPLOYED, LANDING GEAR HORN SOUNDED IN CONJUNCTION WITH THREE RED LANDING GEAR LIGHTS. GEAR HANDLE WAS IN THE OFF POSITION, FLAP HANDLE WAS IN THE "FLAP UP" POSITION. REMOVED AND REPLACED ALL FOUR RADIO ALTIMETER ANTENNAS (AALA202511246778), (AALA202511246336), (AALA202511244860), (AALA202511246100). PER AMM 34-33-11. INSTALLATION TEST CHECKS GOOD.