SDR CALA0300282

Service difficulty report · Structure · Boeing 737524

Difficulty date: May 21, 2003
Submitted: June 4, 2003
Operation: Air carrier
Aircraft: N19621
Make and model: Boeing 737524
Aircraft serial: 27334
Aircraft time: 25,078 hours, 13,622 cycles
System (JASC): 5314 · Fuselage Main, Keel
Part: Structure
Condition: Worn
Location: Keelbeam
Stage of operation: IN
How discovered: 9
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

WEAR DAMAGE WAS FOUND AT THE UPPER SURFACE OF THE OUTBOARD FLANGE OF RT KEEL BEAM LOWER STRUCTURE JUST FORWARD OF STA 727 WHILE AIRCRAFT WAS IN MAINTENANCE CHECK AT HOU. THE WEAR WAS CAUSED BY THE FLOATING NUT PLATES ATTACHED TO THE OUTBOARD FLANGE OF THE LOWER STRUCTURE. THE NUT PLATES ARE USED TO ATTACH THE WHEEL WELL FAIRING. THE KEEL BEAM STRUCTURE OUTBOARD FLANGE WAS REPAIRED IAW ECRA 5311-01149.