SDR UALA2012121207164

Service difficulty report · Rod · Boeing 747422

Difficulty date: December 12, 2012
Submitted: January 14, 2013
Operation: Air carrier
Aircraft: N171UA
Make and model: Boeing 747422
Aircraft serial: 24322
Aircraft time: 88,061 hours, 10,398 cycles
Engine: Pwa PW4056
System (JASC): 3231 · Landing Gear Door Retract Section
Part: Rod
Condition: Worn
Location: Rt Wlg Door
Stage of operation: TO
How discovered: O
Nature of condition: E
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

VIBRATION FROM MAIN GEAR RETRACTION REPORTED ON TAKEOFF. FLIGHT CREW WILL FILL OUT VIBRATION REPORT EVEN THOUGH EVERYTHING NORMAL IN FLT DECK CABIN ATTENDANT REPORTED VIBRATION FROM 4R MODERATE TO HEAVY VIBRATION DURING GEAR RETRACTION AND STOPPED WITH GEAR FULL UP. FLT CREW DID NOT FEEL VIBRATION. ONLY FELT BY FLT ATTENDANT AT DOOR 4 RIGHT. SUSPECT GEAR DOORS HAVE PLAY, HAVE DOOR BUSHINGS ON AOG. REPLACED LINKAGE ROD.