SDR USAA2009010590022

Service difficulty report · Intercostal · Boeing 7374B7

Difficulty date: December 24, 2008
Submitted: January 6, 2009
Operation: Air carrier
Aircraft: N438US
Make and model: Boeing 7374B7
Aircraft serial: 24560
Aircraft time: 50,701 hours, 34,140 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Intercostal
Part number: 65458562F4
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

INTERGRANULAR CORROSION ON INTERCOSTAL BETWEEN BS 947 TO BS 967, S21R. REPAIRED INTERCOSTAL BETWEEN BS 947 TO BS 967, S21R IAW DRAWING 65-458562. UPON FURTHER REVIEW BY ENGINEERING, IT HAS BEEN DETERMINED THAT THIS IS NOT CLASSIFIED AS STRUCTURE REQUIRING CPCP INSPECTION.

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