Service difficulty report · Skin · Boeing 747422

Difficulty date
October 8, 1996
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N176UA
Make and model
Boeing 747422
Aircraft serial
24383
Engine
Pwa PW4056
Part
Skin
Part number
65B149624
Condition
Cracked
Location
Ws 821-908
Stage of operation
IN
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

RIGHT WING FIXED LEADING EDGE UPPER SKIN PANEL AT APPROXIMATELY WBL STA 821 TO STA 908 BETWEEN THE NR 3 AND NR 4 ENGINES WAS FOUND CRACKED. THE CRACK MEASURED 44 INCHES LONG IN THE CHORD WISE DIRECTION. CRACK WAS IN OUTER LAYER OF COMPOSITE PANEL ONLY. INTERIM REPAIR ACCOMPLISHED, PERMANENT REPAIR TO BE ACCOMPLISHE D PRIOR TO PLANE TOTAL TIME 25845.