SDR FDEA200905251784

Service difficulty report · Stiffener · Boeing 75721B

Difficulty date: May 25, 2009
Submitted: May 26, 2009
Operation: Air carrier
Aircraft: N933FD
Make and model: Boeing 75721B
Aircraft serial: 24330
Aircraft time: 52,447 hours, 30,243 cycles
System (JASC): 5314 · Fuselage Main, Keel
Part: Stiffener
Part number: 144N812016
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

KEELBEAM STIFFENER HAS INTERGRANULAR CORROSION AT STA 918, RBL 7.0 INCH. CORROSION ON KEEL BEAM STIFFENER AT STA 918, RBL 7, FOUND EXCEEDED SRM ALLOWABLE DAMAGE LIMITS. STIFFENER REMOVED AND REPLACED IAW SRM 51-40-02 REV 97. REPAIR IS CLASSIFED AS MINOR IAW GMM 6-2-100 CRITERIA.

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