SDR F3LA200200361

Service difficulty report · Intercostal · Boeing 737301

Difficulty date: October 8, 2002
Submitted: October 22, 2002
Operation: Air carrier
Aircraft: N578US
Make and model: Boeing 737301
Aircraft serial: 23257
Aircraft time: 55,067 hours, 31,976 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Intercostal
Condition: Cracked
Location: Fuselage
Part time: 55,067 hours, 31,976 cycles
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

DURING C 4 CHECK, THE UPPER FLANGE OF FLOOR INTERCOSTAL WAS FOUND CRACKED AT BS 344 TO BS 360. REMOVED INTERCOSTAL. FABRICATED UPPER FLANGE OF THE INTERCOSTAL IAW SRM 53-10-51 AND INSTALLED ON INTERCOSTAL IAW SRM 53-30-01. INTERCOSTAL INSTALLED IAW SRM 51-40-02.