# SDR SWAA2021080487605

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2021
- Submitted: August 4, 2021
- Operation: Air carrier
- Aircraft: [N940WN](https://openairdocs.org/aircraft/N940WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36900
- Aircraft time: 39,596 hours, 24,067 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Shield
- Condition: Corroded
- Location: Bs 494-500a
- 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/SWAA2021080487605

## Discrepancy

BS 494-500A RBL24.5 WL157 FLOOR TO SIDEWALL SHIELD IS CORRODED. / [01] EVALUATED CORROSION FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-02-0G-0; [02] VERIFIED CORROSION TO BE OUT OF LIMITS DUE TO NO ALLOWABLE DAMAGE IN THE SRM. REPLACE PER SRM 51-10-02-0G-0; [03] REMOVED FCB AFT SHIELD AT BS494-BS500A; RBL24.5; WL 157 PER SRM 51-40-02-0G-0; [04] LOCATED; DRILLED; AND INSTALLED NUTPLATES ON FCB AFT SHIELD BS494-BS500A; RBL24.5; WL157. PER DWG 143A0080; AND SRM 51-40-05-0G-0; [05] VERIFIED;LOCATED; DRILLED; AND INSTALLED NUTPLATES ON FCB AFT SHIELD BS494-BS500A; RBL24.5; WL157. PER DWG 143A0080; AND SRM 51-40-05-0G-0.; [06] INSTALLATION DOCUMENTED ON TTG8Q005PPLQ; [07] VERIFIED INSTALLED ON TTG8Q005PPLQ; [08] VERIFIED INSTALLATION DOCUMENTED ON TTG8Q005PPLQ. FAULT COMPLETE.

---
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.