# SDR SWAA2021072209593

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 2020
- Submitted: July 22, 2021
- Operation: Air carrier
- Aircraft: [N8648A](https://openairdocs.org/aircraft/N8648A), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 42531
- Aircraft time: 21,266 hours, 9,375 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Bs 500i
- 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/SWAA2021072209593

## Discrepancy

FWD PIT STA 500I LATERAL FLOOR SUPPORT UPPER SURFACE CORRODED FROM LBL 24 TO RBL24 AT WL 155 / EVALUATED CORROSION ON LOWER BULKHEAD SUPPORT AT STA 500I LBL 24 - RBL 24 NO PUBLISHED LIMITS IN SRM. REMOVED AND REPLAED RAIL ASSY IAW SRM 51-40-02-0G-0 AND BOEING DWG 143A9481 REV - ATAG WN4193

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