# SDR CALA2026061217058

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 11, 2026
- Submitted: June 18, 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: Channel
- Part number: 143A7501
- Condition: Corroded
- Location: Zone 100
- 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/CALA2026061217058

## Discrepancy

FOUND DAMAGE CORROSION AT THE FWD CARGO FLOOR STRUCTURE  RT ZEE CHANNEL FROM STA 500A TO STA 500L .  REMOVED AND REPLACED RT ZEE CHANNEL BTW BS 500A TO 500L IAW SRM 53-00-53-2R-5 AND SRM 51-40-02-0G-0.

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