# SDR SWAA2021091500063

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 29, 2021
- Submitted: September 15, 2021
- Operation: Air carrier
- Aircraft: [N447WN](https://openairdocs.org/aircraft/N447WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33720
- Aircraft time: 58,733 hours, 34,620 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Bs 754 Rbl 21
- 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/SWAA2021091500063

## Discrepancy

CORROSION ON FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS754 RBL21 WL156. ; / [01] REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BS 754RBL21 WL156;DIMENSIONS L=1.3' W=1.' DEPTH .011 IAW SRM 51-10-02 PARA#15 .EVALUATED TO SIDEWALL SUPPORT ;ORIGINAL THICKNESS .040'REMAINING THICKNESS .029' DAMAGE EXCEED 10% OF ORIGINAL THICKNESS FOUND TO BE OUT LIMITS IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2;TOOL USED MICROMETER S/N 87172291 DATE DUE 05/2022.; [02] VERIFIED REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BS 754RBL21 WL156;DIMENSIONS L=1.3' W=1.' DEPTH .011 IAW SRM 51-10-02 PARA#15 .EVALUATED TO SIDEWALL SUPPORT ;ORIGINAL THICKNESS .040'REMAINING THICKNESS .029' DAMAGE EXCEED 10% OF ORIGINAL THICKNESS FOUND TO BE OUT LIMITS IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2.; [03] THIS DISCREPANCY WILL ACCOMPLISHED ON CARD TTG8Q005ZD26.; [04] THIS DISCREPANCY WILL BE ACCOMPLISHED ON CUSTOMER CARD TTG8Q005ZD26.; [05] VERIFIED FLOOR TO SIDEWALL SUPPORT REPLACED ON FAULT # TTG8Q005ZD26

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