# SDR SWAA2022082232671

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2022
- Submitted: August 22, 2022
- Operation: Air carrier
- Aircraft: N490WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32476
- Aircraft time: 59,880 hours, 35,571 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Cabin Floor
- 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/SWAA2022082232671

## Discrepancy

CORROSION ON BS 986 FLOORBEAM; RBL 35; WL 208 / [01] REMOVED CORROSION FROM PASSENGER CABIN FLOORBEAM BS 986 RBL 35; WL 208 IN AREA OF 1.5' X 1'X 0.09' DEEP ORIGINAL MATERIAL THICKNESS 0.150' FOUND TO BE IN LIMIT IAW SRM 53-70-51-1A-1 DET. 4H; FIG 103-C  TOOLS USED MICROMETER ID: ATS1671; S/N:65093024; DUE10/2022;[02] REMOVED CORROSION FROM PASSENGER CABIN FLOORBEAM BS 986 RBL 35; WL 208 IN AREA OF 1.5' X 1'X 0.09' DEEP ORIGINAL MATERIAL THICKNESS 0.150' FOUND TO BE OUT OF LIMIT IAW SRM 53-70-51-1A-1 DET. 4H; FIG 103-C<BR>TOOLS USED MICROMETER ID: ATS1671; S/N:65093024; DUE10/2022;[03] VERIFIED APPLICABILITY OF SRM 53-70-51-01-1 FOR IDENTIFICATION AND SRM 53-70-51-1A-1 FOR ALLOWABLE LIMIT;[04] VERIFIED CORRECTIVE ACTION 2 AND 3 COMPLETED AND VERIFIED OUT OF LIMITS;[05] 'REFER TO FAULT TTG8Q00DQKNA WHERE EA 22-153-02234 WAS ADDED AS A SUBTASK.  'FAULT RESOLVED ON OTHER FAULT' REPAIR REFERENCE IS SELECTED.;[06] VERIFIED CORRECTIVE ACTION 5;[07] VERIFIED MEASUREMENTS.

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