Service difficulty report · Coupling · Boeing 747422

Difficulty date
August 28, 2012
Submitted
August 30, 2012
Operation
Air carrier
Aircraft
N177UA
Make and model
Boeing 747422
Aircraft serial
24384
Aircraft time
91,576 hours, 11,125 cycles
Engine
Pwa PW4056
Part
Coupling
Condition
Loose
Location
Fuel System
Stage of operation
IN
How discovered
O
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

DRAINED 2 GALLONS OF FUEL FROM APU SHROUD DRAIN AND CONTINUES TO FILL THE BOTTLE. VALVE DOES NOT LEAK. ACP INSPECTION CHECK OF APU FUEL SHROUD IAW MM 28-25-00 AND FAIL. (8 OZ OF FUEL AFTER 5 MINUTES.) CONT OF AMIS ITEM 5762018. ACCOMPLISHED HST TRANSFER SYS CHECK. APU FEED LINE SHROUD LEAK CHECKED OK. FWD 2 HST FUEL FUEL TRANSFER LINES FAILED TEST, EXCEEDS LIMITS. REMOVED FWD FUEL LINE. GAMMA COUPLING FWD END OF HST TRANSFER LINE NEEDS TO BE SAFTIED. LOCATION:PASS CABIN 1.5FT AFT FROM ACCESS HOLE. SAFTIED GAMMA COUPLING.