# SDR CALA2026061016986

- 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: Channel
- Part number: 146A7502
- 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/CALA2026061016986

## Discrepancy

FOUND DAMAGE CORROSION AT THE AFT CARGO RH ZEE CHANNEL BTW STA 727 TO STA 767. REMOVED AND INSTALLED NEW ZEE CHANNEL ON AFT CARGO BTW STA 727 TO STA 767 IAW B737-9MAX SRM SRM 53-00-53-2R-5 STEP 4, (L) AND SRM 51-40-02-0G-0 STEP 4

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