Service difficulty report · Forging · Boeing 747121

Difficulty date
July 14, 2000
Submitted
October 13, 2000
Operation
Air carrier
Aircraft
N691UP
Make and model
Boeing 747121
Aircraft serial
19641
Aircraft time
95,273 hours, 22,812 cycles
Part
Forging
Condition
Corroded
Location
Fuselage
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

INSPECTION TYPE:C, CABIN WINDOW FORGING CORRODED AT BS 1920 TO BS 1940 RT. FORGING REMOVED IAW SRM 51-30-02 AND CORROSION REMOVED IAW SRM 51-10-01 AND 56-20-01. CORROSION REMOVED = .006. FORGING RE-INSTALLED IAW SRM 51-30-02 AND QUERY NOTE 66/2000. BLEND OUT ALL CORROSION AND OVERSIZE HOLES BY .0156 AND HFEC FOR CRACKS. MAINTAIN MIN EDGE MARGIN OF 1.5.