Service difficulty report · Skin · Boeing 747422

Difficulty date
August 11, 2005
Submitted
August 16, 2005
Operation
Air carrier
Aircraft
N178UA
Make and model
Boeing 747422
Aircraft serial
24385
Aircraft time
63,816 hours, 7,998 cycles
Engine
Pwa PW4056
Part
Skin
Condition
Damaged
Location
Str 28l Sta 490
Stage of operation
IN
How discovered
9
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

CRACK FOUND ADJACENT TO FASTENER HOLE STR 28L STA 490. OUTER SKIN CRACKED AT FASTENER HOLE AND TRIMMED AWAY. SKIN'S INNER BONDED DOUBLER ALSO CRACKED AND TRIMMED AWAY. ALSO, FOUND INTERCOSTAL BRACKET ATTACHED TO SKIN AND INTERCOSTAL WEB BUT NOT ATTACHED TO FRAME WEB. SUSPECT THIS PRODUCTION ERROR TO BE RESPONSIBLE FOR SKIN AND BONDED DOUBLER CRACKS.