# SDR SWAA2021062875603

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 21, 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: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2021062875603

## Discrepancy

AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT L/H BS727-BS847 LBL21 ; / [01] VERIFIED APPLICABILITY OF SRM 53-60-53-01-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE; [02] REMOVED CORROSION FROM MULTIPLE AREAS OF ACB FLOOR TO SIDEWALL SUPPORT L/H BS727-BS847 LBL21; MAXIMUM BLENDED AREA 3'X1'; AND DEEPEST POINT EXCEED 50% OFF MAXIMUM LOSS; EVALUATED AREA AND FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PAR. 4.A(2) FIG. 103; DETAIL A; PART REPAIRABLE BY REPLACEMENT.<BR>TOOL USED: DIAL DEEP GAUGE ID:ATS401; DUE DATE: 04/2022; [03] REMOVED CORROSION FROM ACB FLOOR TO SIDEWALL SUPPORT L/H BS727-BS847 LBL21; MAXIMUM BLENDED AREA 3'X1'X0.020' DEEP ORIGINAL MATERIAL THICKNESS 0.040' FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PAR. 4.A(2) FIG. 103; DETAIL A.TOOL USED: DIAL DEEP GAUGE ID:ATS401; S/N UNKNOWN; [04] VERIFIED REMOVAL OF CORROSION FROM ACB FLOOR TO SIDEWALL SUPPORT L/H BS727-BS847 LBL21; MAXIMUM BLENDED AREA 3'X1'X0.020' DEEP ORIGINAL MATERIAL THICKNESS 0.040' FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PAR. 4.A(2) FIG. 103; DETAIL A.

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