Service difficulty report · Fastener · Boeing 747422

Difficulty date
April 3, 2013
Submitted
April 5, 2013
Operation
Air carrier
Aircraft
N122UA
Make and model
Boeing 747422
Aircraft serial
29168
Aircraft time
57,250 hours, 6,685 cycles
Engine
Pwa PW4056
Part
Fastener
Condition
Damaged
Location
Rt 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

ON TOP OF RIGHT WING BETWEEN ENG 3 AND 4, BUT CLOSER TO ENG 3, SIX FASTENER HEADS IN A ROW ARE MISSING FROM THE PANEL, AND ARE MARKED WITH MASKING TAPE. REPLACED 11 FASTENERS INSTEAD OF 6 ON ORIGINAL TEXT WITH SCREWS AND NUTS REF 51-40-03.