# SDR SWAA2021062876369

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 24, 2021
- Submitted: June 28, 2021
- Operation: Air carrier
- Aircraft: [N207WN](https://openairdocs.org/aircraft/N207WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 34012
- Aircraft time: 52,378 hours, 31,227 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Zone 100
- 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/SWAA2021062876369

## Discrepancy

***CORROSION*** ON FLOOR TO SIDEWALL SUPPORT AT FWD CARGO BAY BS500B+9 LBL22 WL157. ; / [01] VERIFIED APPLICABILITY ON SRM 53-30-53-OI-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE; [02] REMOVED CORROSION FROM FCB FLOOR TO SIDEWALL SUPPORT BS 500B + 9'' LBL22 WL157 P/N 143A7501-183 IN AREA OF 3'X2'X0.020'DEEP; ORIGINAL MATERIAL THICKNESS 0.040'' FOUND TO BE OUT OF LIMIT IAW SRM 53-00-53-1A-2 PAR. 4.A. (2) FIG. 103 DETAIL A. <BR>TOOL USED: DEPTH GAGE; ID:ATS 2473; S/N:UNKNOWN.; [03] VERIFIED REMOVAL OF CORROSION FROM FCB FLOOR TO SIDEWALL SUPPORT BS 500B + 9'' LBL22 WL157 P/N 143A7501-183 IN AREA OF 3'X2'X0.020'DEEP; ORIGINAL MATERIAL THICKNESS 0.040'' FOUND TO BE OUT OF LIMIT IAW SRM 53-00-53-1A-2 PAR. 4.A. (2) FIG. 103 DETAIL A. <BR>TOOL USED: DEPTH GAGE; ID:ATS 2473; S/N:UNKNOWN.; [04] THIS JOB CARD WILL BE ACCOMPLISHED WITH CUSTOMER CARD # TTG8Q0054DRO.; [05] CORRECTED CARD# TO TTG8Q0054DR0; [06] VERIFIED PART WILL BE REPLACED ON TTG8Q0054DR0

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