Service difficulty report · Sealant · Boeing 747422

Difficulty date
September 30, 2012
Submitted
November 15, 2012
Operation
Air carrier
Aircraft
N171UA
Make and model
Boeing 747422
Aircraft serial
24322
Aircraft time
87,248 hours, 10,321 cycles
Engine
Pwa PW4056
Part
Sealant
Condition
Displaced
Location
Nr 2 Pylon
Stage of operation
IN
How discovered
V
Nature of condition
K
Precautionary procedure
O

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

What was found

FUEL LEAKING UNDER WING JUST OUTBOARD OF NR 2 ENGINE FWD PYLON, FUEL LEAK UNDER WING RUNNING TO FUSELAGE. FOUND FUEL LEAKING FROM UPPER OR 2ND FROM TOP BOLT ON PYLON LINK BRACKET, ABOVE PANEL 521AB. ARROW POINTS TO LEAKING BOLT, SEALANT PARTIALLY REMOVED FROM BOLT. AREA IS DIRECTLY OVER ENGINE 2. CLEANED SEALANT OFF OF BOLTS APPLIED SEALANT TO BOLTS INSIDE AND OUTSIDE OF TANK AT 240 0.