SDR USAA951319

Service difficulty report · Floor Beam · Boeing 737401

Difficulty date: December 11, 1995
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N422US
Make and model: Boeing 737401
Aircraft serial: 23989
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floor Beam
Condition: Cracked
Location: Bs 312
Part time: 19,951 hours
Stage of operation: IN
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

INT - DURING Q-3 CHECK VISUAL INSPECTION, FOUND .5 INCH BY 1 INCH CORRODED AREA BS 312, BL 0 (CABIN FLOOR BEAM UPPER FLANGE). CUTOUT CORRODED AREA, FABRICATED AND INSTALLED REPAIR ANGLES AND FILLER. REPAIRED PER SRM 53-10-51 AND FIG 206, CORROSION TASK NR C53-107-02, CORROSION LEVEL 2. (M)