# SDR SWAA2020030442069

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 10, 2020
- Submitted: March 4, 2020
- Operation: Air carrier
- Aircraft: [N7879A](https://openairdocs.org/aircraft/N7879A), registered now
- Make and model: Boeing 737-7K9
- Registry model: [Boeing 737-7K9](https://openairdocs.org/model/boeing-737-7k9) (OpenAirDocs)
- Aircraft serial: 34321
- Aircraft time: 44,713 hours, 21,719 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Part number: 143A75000
- Condition: Corroded
- Location: Fuselage
- 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/SWAA2020030442069

## Discrepancy

***CORROSION***  FORWARD CARGO BAY L/H Z-CHANNEL HAD CORROSION ON FASTENER HOLES FROM STA 400-500D, LBL 24, WL 157         CORROSION ON FORWARD CARGO BAY L/H Z CHANNEL FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2. R&R L/H ZEE CHANNEL PER SRM 51-40-02, SRM 57-40-05, SRM 53-00-53-2R-5 AND BOEING DRAWING 143A7500. CHANNEL SPLICE LOCATED AT BS 480-500 LBL 24 WL 157

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