SDR 2007UALA01523

Service difficulty report · Module · Boeing 747422

Difficulty date: May 16, 2007
Submitted: June 6, 2007
Operation: Air carrier
Aircraft: N179UA
Make and model: Boeing 747422
Aircraft serial: 25158
Aircraft time: 67,824 hours, 8,451 cycles
Engine: Pwa PW4056
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Module
Part number: 257U000228
Condition: Failed
Location: Mlg
Stage of operation: CL
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

AFTER DEPARTURE, LANDING GEAR WOULD NOT RETRACT. A/C RETURNED TO FIELD, EXPERIENCED A RECURRENCE OF THIS CONDITION ON NEXT FLIGHT OUT. AFTER EXTENSIVE TROUBLE SHOOTING, INCLUDING ON-GRND GEAR CYCLES, ISOLATED PROBLEM TO LANDING GEAR HANDLE MODULE. REPLACED LEVER ACTUATOR LG HANDLE MODULE, LNDG GEAR SYST, OP CHECKED OK REF MM 32-31-01.