# SDR SWAA2022012582571

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 19, 2017
- Submitted: January 25, 2022
- Operation: Air carrier
- Aircraft: [N749SW](https://openairdocs.org/aircraft/N749SW), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29801
- Aircraft time: 63,290 hours, 36,543 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Threshold
- Condition: Corroded
- Location: Fed Threshold
- 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/SWAA2022012582571

## Discrepancy

L-1 DOOR THRESHOLD STRUCTURE HAS CORROSION AS MARKED; / REMOVED CORROSION FROM L-1 DOOR 2 STRUCTURE. Z STRUCTURAL ORIGINAL THICKNESS .050'; REMOVED MATERIAL LOSS .007'; REMAINING THICKNESS .043'. Z STRUCTURAL OUT OF LIMITS. REMOVED CORRODED Z STRUCTURAL AND INSTALLED NEW Z STRUCTURE. I.A.W. BOEING DWG. NO. 141A8110 REV. A; B737 SRM 51-40-02-0G-0; SRM 51-40-05-06-0

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