# SDR CALA2026061016988

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2026
- Submitted: June 10, 2026
- Operation: Air carrier
- Aircraft: [N37521](https://openairdocs.org/aircraft/N37521), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 64497
- Aircraft time: 18,129 hours, 6,039 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Floor Support
- Part number: 143A948535
- 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/CALA2026061016988

## Discrepancy

FOUND CORROSION AT THE MID LOWER AFT BULKHEAD SUPPORT PANEL AT STA 500L.   REMOVED AND REPLACED LOWER RAIL ASSY  OF MID LOWER AFT BULKHEAD PANEL AT STA. 500L. IAW SRM 51-40-02-0G-0 STEPS 4 &7, 51-40-05-0G-0 AND 51-40-08-0G-0.

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