SDR CALA2026031214515

Service difficulty report · Floor Support · Boeing 737924ER

Difficulty date: March 6, 2026
Submitted: March 12, 2026
Operation: Air carrier
Aircraft: N53441
Make and model: Boeing 737924ER
Aircraft serial: 30131
Aircraft time: 52,435 hours, 18,701 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Floor Support
Part number: 146A750139
Condition: Corroded
Location: Zone 100
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

MULTIPLE AREAS OF CORROSION ON FLOOR SUPPORT BEHIND AFT CARGO DOOR ENTRANCE BETWEEN BS 787 & 827. REMOVED THE CORROSION FROM THE FLOOR SUPPORT, OUT OF LIMITS IAW SRM 53-00-53-1A-2. REMOVED AND REPLACED THE FLOOR SUPPORT, BS 727I - 887, RBL 16 IAW SRM 51-40-02 & DWG 146A7500, REV-.