Service difficulty report · Stiffener · Boeing 747212B

Difficulty date
December 30, 2005
Submitted
January 13, 2006
Operation
Air carrier
Aircraft
N520UP
Make and model
Boeing 747212B
Aircraft serial
21943
Aircraft time
80,484 hours, 17,793 cycles
Part
Stiffener
Part number
65B100983
Condition
Cracked
Location
Keelbeam Box
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 AIR CONDITIONING BAY KEEL BEAM BOX LT EXTERNAL VERTICAL STIFFENER FOUND CRACKED AT BS 983 LBL 9" LOWER AREA, CRACK LENGTH 2". FX AIR CONDITIONING BAY KEEL BEAM BOX AT BS 983 LBL 9" VERTICAL STIFFENER REPLACED IAW SRM 51-10-01 PG 9.

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