# SDR SWAA2020033120988

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 1, 2020
- Submitted: March 31, 2020
- Operation: Air carrier
- Aircraft: [N458WN](https://openairdocs.org/aircraft/N458WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33857
- Aircraft time: 55,631 hours, 33,048 cycles
- System (JASC): [5312 · Fuselage Main, Bulkhead](https://openairdocs.org/jasc/5312)
- Part: Rail
- Part number: 143A98535
- 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/SWAA2020033120988

## Discrepancy

FORWARD CARGO PIT AFT BULKHEAD STA 500D STRUCTURE LOWER CHORD HAS CORROSION ON UPPER SURFACE LBL24-RBL24 WL156 / REMOVED FORWARD CARGO AFT BULKHEAD STRUCTURE LOWER RAIL CHORD IAW SRM 51-40-02-0G-0 DUE TO CORROSION. VERIFIED NEW LOWER RAIL PART NO 143A985-35 IAW BOEING DWG 143A9481 REV -. LOCATED; DRILLED AND INSTALLED NEW LOWER SUPPORT RAIL ANGLE IAW SRM 51-40-05-0G-0 SRM 51-40-02-0G-0 AND BOEING DWG 143A9481 REV-

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