Service difficulty report · Shutoff Valve · Boeing 777222

Difficulty date
April 29, 2011
Submitted
May 19, 2011
Operation
Air carrier
Aircraft
N219UA
Make and model
Boeing 777222
Aircraft serial
30551
Aircraft time
42,958 hours, 5,292 cycles
Engine
Pwa PW40903
Part
Shutoff Valve
Condition
Leaking
Location
Hyd System
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

RUNNING HYDRAULIC LEAKAGE AT CTR SYS WING FLIGHT CONTROL SHUTOFF VALVE AT LT MAIN LANDING GEAR WHEEL WELL. FOUND INLET VALVE (LOWER) TUBING LEAKING. AFTER TIGHTENING GOT LEAKAGE TO 1 DROP PER MINUTE. NOW ITS WITHIN DISPATCH LIMITS AS PER AMM. SUGGEST TUBE & UNION REPLACEMENT. REPLACED CENTER SYSTEM WING FLIGHT SHUTOFF VALVE. OPERATION CHECKS OKAY. NO LEAKS NOTED.