# SDR SWAA2022020457914

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 2022
- Submitted: February 4, 2022
- Operation: Air carrier
- Aircraft: [N452WN](https://openairdocs.org/aircraft/N452WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29846
- Aircraft time: 60,081 hours, 35,724 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Floorbeam
- Part number: 147A55068
- Condition: Corroded
- Stage of operation: UK
- 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/SWAA2022020457914

## Discrepancy

CORROSION AROUND FASTENER HOLES ON FLOORBEAM UPPER FLANGE BS 986.5, RBL 28'-46'.   EVALUATED REWORKED AREA ORG. MAT.0.150' MAT REMAINING 0.100' MAT REMOVED 0.050' FOUND TO BE OUT OF LIMITS IAW SRM=53-70-51-11A-1. LOCATED AND DRILLED HOLES IAW B737 SRM 53-70-51-2R-4 REPAIR4, FIG204, SHEET 2.   REPAIRED IAW SRM 51-40-05-0G-0 AND 53-70-51-2R-4 REPAIR 4.

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