Service difficulty report · Skin · Boeing 747341

Difficulty date
February 2, 2007
Submitted
February 5, 2007
Operation
Air carrier
Aircraft
N355MC
Make and model
Boeing 747341
Aircraft serial
23395
Aircraft time
62,240 hours, 12,403 cycles
Engine
Ge CF650E2
Part
Skin
Part number
65B940512
Condition
Cracked
Location
Nr 2 Nacelle
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

NR 2 PYLON PRECOOLER EXHAUST CUT-OUT CRACKED AT LOWER AFT CORNER AT NAC 248. THE SKIN ASSEMBLY CRACKS WERE REMOVED BY TRIMMING. THE NR 3 STIFFENER WAS REINFORCED WITH A SUPPLEMENTARY STEEL LOWER ANGLE FROM NAC STATION 235 TO 254. THE RIB INSTALLATION AT NAC STATION 248 WAS MODIFIED TO ACCOMMODATE THE STEEL REPAIR ANGLE INSTALLED ON THE NR 3 STIFFENER. REPAIRED AREAS WERE NDT INSPECTED.