# SDR SWAA2022072519569

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 16, 2022
- Submitted: July 25, 2022
- Operation: Air carrier
- Aircraft: [N478WN](https://openairdocs.org/aircraft/N478WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33989
- Aircraft time: 60,197 hours, 35,659 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Condition: Corroded
- Location: Aft Cargo
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2022072519569

## Discrepancy

AFT CARGO FLOOR SUPPORT 22 LEFT OF CENTER LINE 'Z' CHANNEL AT 727B - 807 HAS CORROSION / [01] EVALUATION OF AFT CARGO L/H ZEE CHANNEL FROM STA 727B TO STA 807 WAS FOUND EXFOLIATED AS PER SRM 53-00-53-1A-2;[02] L/H ZEE CHANNEL STA 727B TO STA 807 WAS FOUND OUT OF LIMITS ; RECEIVED NEW ZEE CHANNEL P/N: 146A7502-27. PART WILL BE INSTALLED ON ACO T/C: TTG8Q004E8P6.;[03] [FINAL] VALIDATED STEPS 1 & 2

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