SDR UPS00434001

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
System (JASC): 5310 · Fuselage Main, Structure
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 1500 TO BS 1520 RT. FORGING REMOVED IAW SRM 51-30-02 AND CORROSION REMOVED IAW SRM 51-10-01 AND 56-20-01. CORROSION REMOVED = .008. FORGING RE-INSTALLED PER SRM 51-30-02 AND QUERY NOTE 46/2000. BLEND OUT ALL CORROSION AND OVERSIZE HOLES BY .0156. MAINTAIN MIN EDGE MARGIN OF 1.5. EXCEPT FOR 3 HOLE LOCATION WHICH HAVE AN EM OF 0.48 TO 0.5.