# SDR SWAA2021071529419

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 10, 2020
- Submitted: July 15, 2021
- Operation: Air carrier
- Aircraft: [N8657B](https://openairdocs.org/aircraft/N8657B), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 42535
- Aircraft time: 20,411 hours, 9,034 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Rail
- Part number: 143A948535
- Condition: Corroded
- Location: Fuselage
- 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/SWAA2021071529419

## Discrepancy

FWD PIT LATERAL FLOOR SUPPORT UPPER SURFACE CORRODED AT STA 500I FROM RBL24 TO LBL24 AND W/L157 / NO LIMITS PUBLISHED; FOUND PART OUT OF LIMITS. 100% MATERIAL LOSS ON FWD PIT LATERAL FLOOR SUPPORT (RAIL) STA 500I RBL 24 TO LBL 24. REMOVED AND REPLACED RAIL P/N 143A9485-35 TAG # WN8765 IAW B737 SRM 51-40-02-0G-0 AND DWG 143A9481 REV. -

---
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.