SDR CALA2025101009896

Service difficulty report · Floorbeam · Boeing 737924ER

Difficulty date: October 8, 2025
Submitted: October 10, 2025
Operation: Air carrier
Aircraft: N75436
Make and model: Boeing 737924ER
Aircraft serial: 33531
Aircraft time: 50,986 hours, 18,232 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Part number: 147A550423
Condition: Corroded
Location: Zone 200
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

MAIN CABIN AFT WET AREA,CORROSION AROUND SCREW HOLES ON FLOORBEAM AT STA 947.5,BETWEEN LBL-10 AND RBL-10. ACCOMPLISHED REPAIR AT STA 947.5 FLOOR BEAM IN REF WITH B737 -900 ER SRM 53-00-51-2R-1, AAR ESR 20-12933 AND ECRA 5370-01199, PENDING ESFR ENTRY, NO DIP REQUIRED.