SDR FDEA200904281452

Service difficulty report · Stiffener · Boeing 75721B

Difficulty date: April 28, 2009
Submitted: April 28, 2009
Operation: Air carrier
Aircraft: N933FD
Make and model: Boeing 75721B
Aircraft serial: 24330
Aircraft time: 52,447 hours, 30,243 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Stiffener
Part number: 144N812017
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 STIFFENER HAS INTERGRANNULAR CORROSION AT STA 910, LBL 8.0 INCH. CORROSION ON KEEL BEAM STIFFENER AT STA 910, LBL 8 INCH, BLENDED AND FOUND EXCEEDED SRM ALLOWABLE DAMAGE LIMITS. STIFFENER REMOVED AND REPLACED SRM 51-40- 02 REV 97. REPAIR IS CLASSIFIED AS MINOR IAW GMM 6-2-100 CRITERIA.

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