Service difficulty report · Skin · Boeing 747422

Difficulty date
November 21, 2010
Submitted
December 3, 2010
Operation
Air carrier
Aircraft
N178UA
Make and model
Boeing 747422
Aircraft serial
24385
Aircraft time
84,591 hours, 10,299 cycles
Engine
Pwa PW4056
Part
Skin
Condition
Damaged
Location
Lt Wing
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

SKIN HAS IMPACTED AREAS WITH DELAMINATION OF APPROX 1 INCH DIAMETER, WITHOUT PENETRATION. LEFT WING TRAILING EDGE BETWEEN WING TIP AND AILERON: 25 SPOTS IN 11 AREAS. AREAS WITH PERMANENT DEFLECTION AVG DEPTH APPROX .010 INCH AND NO EXPOSED FIBERS NOTED AT THIS TIME. MADE REPAIRS TO DELAMINATED AREAS PER SRM.