Service difficulty report · Skin · Boeing 747422

Difficulty date
January 8, 2011
Submitted
February 15, 2011
Operation
Air carrier
Aircraft
N199UA
Make and model
Boeing 747422
Aircraft serial
28717
Aircraft time
54,084 hours, 6,426 cycles
Engine
Pwa PW4056
Part
Skin
Condition
Damaged
Location
Lt Wing
Component
Winglet
Component part number
119U002059
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

EVIDENCE OF LEFT WING TIP SCRAPE ON UPPER TOP SURFACE AFTER TOW INTO GATE ON AIRCRAFT ARRIVAL. WINGLET TIP SCRAPE LENGTH 34 INCH. MAIN GOUGE AREA IS 2 INCH LONG, STARTING 3'5 INCH FROM AFT TIP EDGE, DEEPEST GOUGE DEPTH IS 0'118 INCH. AFT TIP CURL IS 0'551 INCH OFF CHORD CENTER LINE. AFT TIP MISSING MATERIAL IS 0'394 LONG AND 0'197 DEPTH AT TRAILING EDGE, AND NO HOLE PRESENT. TIME LIMITED REPAIR PERFORMED REF UA EVA 80456 AND SRM 51-00-04. LT WINGLET REMOVED FOR REPAIR. REMOVED AND ROUTED TO SHOP 273 FOR REPAIR. REMOVED WINGLET SN 04153 6M. PCN 180-9463 R & R TO SHOP 273 REF R97056. REINSTALLED LT WINGLET IAW MM.