# SDR SWAA2023050524381

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 6, 2023
- Submitted: May 5, 2023
- Operation: Air carrier
- Aircraft: [N7747C](https://openairdocs.org/aircraft/N7747C), registered now
- Make and model: Boeing 737-7BD
- Registry model: [Boeing 737-7BD](https://openairdocs.org/model/boeing-737-7bd) (OpenAirDocs)
- Aircraft serial: 36091
- Aircraft time: 50,468 hours, 25,711 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Web
- 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/SWAA2023050524381

## Discrepancy

FWD CARGO THRESHOLD WEB IS CORRODED<[01] FOUND EXFOLIATED OUT OF LIMITS CORROSION AT FWD CARGO THRESHOLED WEB PER SRM 53-30-15-1A-1<BR>REMOVED FWD CARGO THRESHOLD WEB PER SRM 51-40-02-0G-0<BR>LOCATED AND DRILLED NEW THRESHOLD WEB PER SRM 51-40-05-0G-0<BR>TREATED AND PRIMED NEW FASTENER HOLES ON THRESHOLD WEB PER AMM 51-21-41-370-803 AND AMM 51-21-72-370-804<BR>APPLIED TOPCOAT TO THRESHOLD WEB PER AMM 51-21-73-370-804<BR>INSTALLED THRESHOLD WEB PER SRM 51-40-02-0G-0;[02] VERIFIED FWD CARGO THRESHOLD REMOVED AND REPLACED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.