# SDR SWAA2021072689896

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 1, 2021
- Submitted: July 26, 2021
- Operation: Air carrier
- Aircraft: [N913WN](https://openairdocs.org/aircraft/N913WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29840
- Aircraft time: 43,304 hours, 26,170 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Bs 500a
- 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/SWAA2021072689896

## Discrepancy

CORROSION ON FCB FLOOR TO SIDEWALL SUPPORT BS 500A+14.5; LBL 25; WL 157 (MARKED). ; / [01] VERIFIED APPLICABILITY OF SRM 53-30-53-0I-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE; [02] REMOVED CORROSION O FCB FLOOR TO SIDEWALL SUPPORT BS500A+14.5'';LBL25;WL157; P/N:143A7501-1; IN AREA 1''X0.9''X0.015''DEEP; ORIGINAL THICKNESS 0.040'' FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PAR.4(2) FIG. 103; DETAIL A.<BR>TOOL USED: DEPTH GAGE ID:ATS2473; N/S/N; [03] CORRECTED MEASUREMENTS; [04] FCB FLOOR TO SIDEWALL SUPPORT BS500A+14.5''; LBL25; WL157; REPLACEMENT TO BE ACCOMPLISHED ON TASK CARD TTG8Q005NAAS; [05] VERIFIED CUSTOMER CARD TTG8Q005NAAS WILL BE REPLACE.

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