Service difficulty report · Shutoff Valve · Boeing 777222

Difficulty date
November 18, 2011
Submitted
November 23, 2011
Operation
Air carrier
Aircraft
N788UA
Make and model
Boeing 777222
Aircraft serial
26942
Aircraft time
64,317 hours, 9,220 cycles
Engine
Pwa PW40903
Part
Shutoff Valve
Condition
Leaking
Location
Hydraulic Sys
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

HYDRAULIC FLUID LEAKING FROM CENTER HYDRAULIC SYSTEM TAIL SHUTOFF VALVE. REPLACED CTR HYD SYS TAIL SHUTOFF VLV PER AMM. NEW VLV LEAKING AT INBD UNION TO V VLV BODY CONNECTION. REPLACED SHUTOFF VLV AGAIN AND ALSO INBD UNION PER AMM. NO LEAKS AND TEST NORMAL.