# SDR SWAA2022092765189

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 2022
- Submitted: September 27, 2022
- Operation: Air carrier
- Aircraft: [N489WN](https://openairdocs.org/aircraft/N489WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33855
- Aircraft time: 57,460 hours, 34,246 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: None
- 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/SWAA2022092765189

## Discrepancy

STA 344 FLOOR BEAM UPPER FLANGE HAS CORROSION COMMON TO FASTENER HOLES AT LBL 11 AND BL 0; WL 208.1. / [01] VERIFIED APPLICABILITY FOR SRM 53-10-51-1A-1<BR>REMOVED CORROSION FROM STA 344 FLOOR BEAM UPPER FLANGE; BEING OUT OF LIMITS; WITH ORIGINAL THICKNESS 0.175'<BR>STA 344 LBL 11 L= 1.300' W= 1' D= 0.043' FOUND OUT OF LIMITS<BR>STA 344 BL 0 L= 2.600' W= 1' D= 0.026' FOUND OUT OF LIMITS<BR>IAW SRM 53-10-51-1A-1<BR>TOOL: DIAL DEPTH GAGE<BR>ID: ATS401<BR>S/N: UNKNOWN<BR>DATE: 10/2021<BR>DUE: 10/2022;[37] INSTALLED INTERCOSTALS AND REPAIR PARTS BETWEEN BS 34 TO BS 360 ; RBL 11; LBL 11 ; LB 0 IAW SRM 53-10-51-2R-10 AND EA 22-153-02676 REV A;[38] VERIFIED CORRECTIVE ACTION 37;[39] VERIFIED CORRECTIVE ACTION STEP 37.;[40] OK TO INSTALL FLOOR

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