# SDR USAA040453

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 2004
- Submitted: September 24, 2004
- Operation: Air carrier
- Aircraft: N426US
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24548
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Condition: Corroded
- Location: Fuselage
- Part time: 41,553 hours
- 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/USAA040453

## Discrepancy

PIT - FOUND Z-CHANNEL CORRODED .25 INCH AREA (6 EACH), MED ENTRANCE FLOOR AREA OUTBOARD SILL SUPPORT AROUND FASTENER HOLES.  REPLACED Z-CHANNEL PER BOEING DWG 65-17688.  (M)

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