Service difficulty report · Link · Boeing 747121

Difficulty date
September 25, 2004
Submitted
October 22, 2004
Operation
Air carrier
Aircraft
N681UP
Make and model
Boeing 747121
Aircraft serial
19661
Aircraft time
104,265 hours, 26,546 cycles
Engine
Pwa JT9D7A
Part
Link
Part number
65B132613
Condition
Corroded
Location
Keelbeam
Stage of operation
IN
How discovered
9
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 FX- KEEL BEAM BOX INNER HORIZ SUPPORT LINK CORRODED AT BS 1460 WL 118. CORROSION MACHINED OFF AT BOTH SIDE VERTICAL RIBS 0.030 INCH AT BOTTOM HORIZ RIB 0.020 INCH . KEEL BEAM BOX INNER HORIZ SUPPORT LINK REPLACED IAW HX RS NR R-53-49-35206 AND UPS RA NR 747-53-20195.