# SDR CALA2025121011992

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 9, 2025
- Submitted: December 10, 2025
- Operation: Air carrier
- Aircraft: [N37287](https://openairdocs.org/aircraft/N37287), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31636
- Aircraft time: 66,324 hours, 24,763 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Floor Support
- Part number: 113A5410170
- Condition: Cracked
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025121011992

## Discrepancy

MAIN CABIN FLOOR SUPPORT UPPER FLOORBOARD ATTACH FLANGE IS CRACKED IN MULTIPLE LOCATIONS BETWEEN BS 380 & 400, BL 0.   REMOVED AND REPLACED THE FLOOR SUPPORT IAW SRM 51-40-02 & DWG  143A5400 REV -.

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