Service difficulty report · Skin · Boeing 747422

Difficulty date
June 20, 2010
Submitted
June 21, 2010
Operation
Air carrier
Aircraft
N173UA
Make and model
Boeing 747422
Aircraft serial
24380
Aircraft time
78,822 hours, 8,954 cycles
Engine
Pwa PW4056
Part
Skin
Condition
Delaminated
Location
Lt Wing
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

LEFT UPPER WING FIXED T/E PANEL HAS WATER INGRESS AND DELAMINATED IN 2 LOCATIONS. WATER INGESTING FOUND ON LT UPPER WING TE PANEL AT TWO LOCATIONS DIRECTLY BELOW PREVIOUS REPAIR. ONE AREA IS APPROX 10 X 6" AND THE OTHER IS ABOUT 3" DIAMETER, MARKED AREA ON LOWER SURFACE. TAP TEST ALSO FOUND DISBONDING AT PREVIOUS REPAIR ON UPPER WING SURFACE. PANEL REPAIRED REF UA-EVA-73860.