Service difficulty report · Structure · Boeing 747422

Difficulty date
May 21, 2012
Submitted
June 23, 2012
Operation
Air carrier
Aircraft
N122UA
Make and model
Boeing 747422
Aircraft serial
29168
Aircraft time
53,644 hours, 6,328 cycles
Engine
Pwa PW4056
Part
Structure
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

LEFT WINGLET OTBD SIDE HAS LIGHTNING STRIKE ON ONE FASTENER LOCATED 1-3 UP ON VERTICAL ROW OF REAR SPAR. LOCATED WITHIN CRITICAL AREA REF CF987 AND 989 REMOVED LEFT WINGLET. NEW WINGLET UP AND TORQUED. BUT MID FAIRING FWD SECTION DOES NOT FIT. TRIED SWAPPING LEADING EDGE NUT STRIP, NO HELP. NUT STRIPS NEED TO BE REATTACHED ON OLD AND NEW WINGLETS. REINSTALLED REPAIRED ORIGINAL WINGLET PER MM.