Service difficulty report · B-Nut · Boeing 747422

Difficulty date
September 29, 2012
Submitted
October 18, 2012
Operation
Air carrier
Aircraft
N178UA
Make and model
Boeing 747422
Aircraft serial
24385
Aircraft time
91,534 hours, 11,030 cycles
Engine
Pwa PW4056
Part
B-Nut
Condition
Loose
Location
Rt Wlg
Stage of operation
IN
How discovered
V
Nature of condition
K
Precautionary procedure
K

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

What was found

ON ARRIVAL FOUND LARGE HYD LEAK AT RIGHT WING GEAR. FOUND VALVE JUST ABOVE RIGHT WING L GEAR AND FWD WING SPAR, TIGHTEN B-NUT 1 AND HALF TURN VALVE POSSIBLE GEAR DOORS SEQUENCE VALVE. ACP CLN AND LEAK CHECK OF ALL AREA FITTINGS PER MM, NO LEAKS NOTED.