SDR AALA202405144604

Service difficulty report · Gearbox · Boeing 737823

Difficulty date: May 6, 2024
Submitted: May 14, 2024
Operation: Air carrier
Aircraft: N920AN
Make and model: Boeing 737823
Aircraft serial: 29521
Aircraft time: 60,446 hours, 24,707 cycles
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Gearbox
Part number: UNKNOWN
Condition: Faulty
Location: Mlg
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: UPON LOWERING LANDING GEAR, GOT THREE GREEN LIGHTS AND THREE RED LIGHTS (ON FWD INSTRUMENT PANEL), (ALL SIX LIGHTS ILLUMINATED), OVERHEAD PANEL SHOWED THREE GREEN LIGHTS. REPLACEMENT OF LANDING GEAR SELECTOR VALVE (AALA202405075166), PER AMM 32-31-51 AND GEARBOX (AALA202405144604) AND PUSH PULL CABLE (AALA202405147919) PER AMM 32-31-22.