# SDR SWAA2023042417717

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2023
- Submitted: April 24, 2023
- Operation: Air carrier
- Aircraft: [N957WN](https://openairdocs.org/aircraft/N957WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 41528
- Aircraft time: 38,518 hours, 23,626 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Threshold
- Condition: Corroded
- Location: Zn 100 Fus Lower
- 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/SWAA2023042417717

## Discrepancy

MULTIPLE AREA OF CORROSION ON FWD CARGO BAY THRESHOLD AT RBL 23-29 BS 440-480+11 WL 156.<[01] VERIFIED APPLICABILITY PER SRM 53-30-15-1A-1 AND ID 53-30-15-O-0I-1.<BR><BR>COMPLETED STEPS;[02] VERIFIED CORRECTIVE ACTION 1 AND STEPS 1-3.;[03] LOCATED AND DRILLED NEW THRESHOLD WEB PER SRM 51-40-02 AND DWG # 143A8330;[04] VERIFIED CORRECTIVE ACTION #3.;[05] UPDATED PARTS USAGE;[06] VERIFIED MEASUREMENT TABLE COMPLETED.<BR>VERIFIED NO FURTHER ACTION REQUIRED.

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