# SDR CALA2026011212884

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 9, 2026
- Submitted: January 12, 2026
- 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: 147A5690U8
- Condition: Corroded
- 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/CALA2026011212884

## Discrepancy

MAIN CABIN FLOOR SUPPORT IS CORRODED ON UPPER SURFACE OF UPPER FLANGE AT APPROX STA 921 LBL50 AT LAV MOUNT FITTING.   REMOVED AND REPLACED MAIN CABIN FLOOR SUPPORT INTERCOSTAL AT APPROX STA 921 LBL50 AT LAV MOUNT FITTING INTERCOSTAL IAW B737- 800 SRM 51-40-02 AND BOEING DWG 147A5680 REV A.

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