# SDR SWAA2026101975411

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 9, 2026
- Submitted: October 20, 2026
- 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: 39,097 hours, 19,276 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Zone 200
- 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/SWAA2026101975411

## Discrepancy

CORROSION FOUND ON FWD WET AREA FLOORBEAMS AT BS 344, RBL 9, & BS 344, RBL 17, WL 208.  CORROSION EVALUATED AND REMOVED FLOORBEAM UPPER FLANGE RBL9 WL208 AND RBL17 1"X1" AREA ORIGINAL MATERIAL THICKNESS IS 0.175" LOWEST MATERIAL THICKNESS IS 0.170"   CORROSION FOUND TO BE WITHIN LIMITS.  APPLIED CHEMICAL CONVERSION COAT AND PRIMED ALL IAW SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1.

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