# SDR SWAA2022101749303

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 29, 2022
- Submitted: October 17, 2022
- Operation: Air carrier
- Aircraft: [N266WN](https://openairdocs.org/aircraft/N266WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32523
- Aircraft time: 52,718 hours, 31,500 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: None
- Condition: Corroded
- Location: Aft Cargo
- 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/SWAA2022101749303

## Discrepancy

AFT CARGO BAY DOOR CUTOUT THRESHOLD HAS SEVERAL AREAS OF CORROSION STA 787 TO 847 WL 157. / [01] ENTERED MEASUREMENTS.;[02] B737-700 SRM 53-60-15-1A-1A IS APPLICABLE FOR THIS EVALUATION.<BR>REMOVED CORROSION DAMAGE IAW SRM 51-10-02-0G-0.<BR><BR>AREAS OF CORROSION:<BR>BS 794+9' - 1.30'L X 0.70'W X 0.005'D<BR>BS 807+1' - 0.90'L X 0.80'W X 0.006'D<BR>BS 807+3' - 1.50'L X 1.10'W X 0.009'D<BR>BS 807+5' - 1.40'L X 0.90'W X 0.007'D<BR>BS 807+7' - 1.40'L X 1.00'W X 0.006'D<BR>BS 827+10'- 1.20'L X 0.80'W X 0.008'D<BR><BR>ORIGINAL MATERIAL THICKNESS: 0.050'. REMAINING MATERIAL: 0.041'<BR>MATERIAL LOSS IS MORE THAN 10%.<BR>CORROSION DAMAGE FOUND TO BE OUT OF ALLOWABLE DAMAGE LIMITS IAW SRM 53-60-15-1A-1.<BR>REPAIR BY REPLACEMENT IAW SRM SRM 51-10-02-0G-0.;[03] DIAL DEPTH GAGE:<BR>ATS401; S/N UNKNOWN; CAL DUE 10/2022.;[04] VERIFIED CORRECTIVE ACTION 1-3 AND MEASUREMENT FIELD;[05] PROCURED NEW SUB THRESHOLD WEB; LOCATED AND DRILLED PER DWG 146A8340 REV: A ; SRM 51-40-05-0G-0 AND SRM 51-40-08-0G-0.;[06] UPDATED MEASUREMENTS;[07] VERIFIED REPLACEMENT PART TASK COMPLETE

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