Service difficulty report · Keelbeam · Boeing 75721B

Difficulty date
June 23, 2009
Submitted
June 24, 2009
Operation
Air carrier
Aircraft
N933FD
Make and model
Boeing 75721B
Aircraft serial
24330
Aircraft time
52,447 hours, 30,243 cycles
Part
Keelbeam
Part number
144N80234
Condition
Corroded
Location
Zone 100
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

KEEL BEAM CHORD HAS INTERGRANULAR CORROSION AT STA 913, RBL 8.8 INCHES. EVALUATE AND RECTIFY. REPAIR CARRIED OUT IAW EA F-5430-126221 AND SRM 51-20-01 REV. 96. REMOVED CORROSION AND CLEANED IAW SRM 53-40-12 REV. 96, FIGURE 101 DETAIL IV AND SHOT PEEN THE RE-WORKED AREA IAW SRM 51-20-06. REV. 96.. REPAIR IS CLASSIFIED AS MAJOR IAW GMM 6-2-100 CRITERIA.

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