Service difficulty report · Support Bracket · Boeing 75721B

Difficulty date
June 24, 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
Support Bracket
Part number
149N721057
Condition
Corroded
Location
Fairing
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

LT WING TOP WING TO BODY FAIRING SUPPORT BRACKET AT STA 940 WITH CORROSION. EVALUATE AND RECTIFY. RE-WORKS CORRODED AREA FOUND TO EXCEEDED ALLOWABLE LIMITS IAW SRM 51-00-71 REV. 97. MATERIALS REMOVED = 0.055 INCH, MATERIALS REMAINED = 0.025 INCH, MATERIALS THICKNESS = 0.080 INCH. NEW SUPPORT BRACKET FABRICATED IAW DWG 149N7210 SHT 1 REV. E. MATERIAL USING 7075-T0-0.080 INCH SUPPORT BRACKET HEAT TREATED TO T6 CONDITION IAW BAC 5602. PART MARK AS FX 149N721-57 IAW GMM 7-0-1001. REPAIR CLASSIFIED AS MINOR IAW GMM 6-2-100 CRITERIA.

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