SDR USAA960085

Service difficulty report · Floor Beam · Boeing 737401

Difficulty date: January 17, 1996
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N423US
Make and model: Boeing 737401
Aircraft serial: 23990
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floor Beam
Condition: Corrosion
Location: Bs 986
Part time: 19,812 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-5 CHECK VISUAL INSPECTION, FOUND SEVERAL 1 INCH BY 1 INCH CORRODED NUT PLATE HOLES FLOOR BEAM, BS 986 LBL 45 INCHES TO RBL 45 INCHES. MODIFIED PART NR INSTALLED, EXT BAC1505-100703, 7075-T65, BAC1490-2887 AND 2886. REMOVED DAMAGED T-CAP. COMPLETED INSTALLATION OF T-CAP ON FLOOR SEAL AT BS 986.5. REPAIRED PER EA 40627. CORROSION TASK NR C53-107-02, CORROSION LEVEL 2. (M)