# SDR SWAA2022063015188

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2022
- Submitted: June 30, 2022
- Operation: Air carrier
- Aircraft: N7850B
- Make and model: Boeing 737-7Q8
- Registry model: [Boeing 737-7Q8](https://openairdocs.org/model/boeing-737-7q8) (OpenAirDocs)
- Aircraft serial: 28238
- Aircraft time: 59,194 hours, 39,098 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Web
- 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/SWAA2022063015188

## Discrepancy

CORROSION ON AFT CARGO BAY THRESHOLD AT RBL 26 BS 807+1; BS 807+6; BS 827+4. / [01] REMOVED CORROSION AT ACB THRESHOLD RBL 26; <BR>BS 807+1; L=0.8' W=0.7' D=0.007'<BR>BS 807+6; L=0.6' W=0.5' D=0.011' <BR>BS 827+4; L=0.7' W=0.5' D=0.006'<BR> <BR>FOUND TO BE OUT OF LIMITS WITH REMAINING THICKNESS OF 0.034' OF ORIGINAL THICKNESS 0.045' IAW SRM 53-60-15-0I-1 AND SRM 53-60-15-1A-1 <BR><BR>TOOL USED DEPTH GAGE<BR>ID:ATS2473 <BR>S/N: UNKNOWN <BR>DUE DATE:07/2022;[02] VERIFIED CORRECTIVE ACTION ITEM 1. THRESHOLD WEB IS OUT OF LIMITS PER SRM 53-60-15-0I-1 AND SRM 53-60-15-1A-1.;[03] THRESHOLD WEB WILL BE REPAIRED BY REPLACEMENT IAW SRM 51-40-02 PAR 9. <BR><BR>RECEIVED NEW WEB P/N:146A8123U25 ; LOT:1493804-1; P.O/N: 871289/1 AND LOCATED AND DRILLEW NEW WEB AT AFT CARGO BAY BTW BS 792 TO BS 849 ; RBL 20 TO RBL 28 IAW SRM 51-40-05.;[04] VERIFIED CORRECTIVE ACTION ITEM 3; MEASUREMENT FIELDS 19 AND 22 INCORRECT.;[05] FIXED MEASUREMENT CHART;[06] TASK CARD COMPLETE;[07] VERIFIED MEASUREMENT FIELDS; JOB COMPLETE.

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