Service difficulty report · Panel · Boeing 747422

Difficulty date
December 10, 2012
Submitted
January 18, 2013
Operation
Air carrier
Aircraft
N179UA
Make and model
Boeing 747422
Aircraft serial
25158
Aircraft time
90,391 hours, 10,874 cycles
Engine
Pwa PW4056
Part
Panel
Condition
Debonded
Location
Rt Wing
Stage of operation
IN
How discovered
U
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

REF CF9129 AND MF1160 RIGHT WING UPPER I/B TRAILING EDGE PANEL ACP ULTRASONIC INSP PER ECRA 5722-01033 PT2. FOUND UPPER AND LOWER SURFACE DISBONDED. UPPER SURFACE IS BULGING. (FLY AWAY PNL). PERFORMED NDT INSP PER NDT PART 457-22-01 RECONFIRMING THE LOWER SURFACE IS DISBONBED AROUND TITANIUM DOUBLERS & TRAILING EDGE OF THE PANEL, UPPER SURFACE ALSO DISBONDED INCLUDING I/B AND O/B EDGES, MARKED.