# SDR SWAA2022061512859

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 28, 2022
- Submitted: June 15, 2022
- Operation: Air carrier
- Aircraft: [N8632A](https://openairdocs.org/aircraft/N8632A), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 60082
- Aircraft time: 27,537 hours, 12,517 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Threshold Web
- Part number: 146A8340
- Condition: Corroded
- Location: Aft Cargo Bay
- 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/SWAA2022061512859

## Discrepancy

CORROSION ON SUBTHRESHOLD WEB AT AFT CARGO BAY BS796 - BS847 RBL 26. MARKED. / [01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 800 REMOVED 0.015' IN A AREA OF 1'X1' ORIGINAL THICKNESS 0.045' FOUND TO BE OUT OF LIMITS PER SRM 53-60-15-1A-1 USING ATS TOOL ID ATS2678 EXP 4/2023;[02] VERIFIED CORRECTIVE ACTION 1.;[03] REMOVED ACB SUBTHRESHOLD WEB AT BS787+7 - BS847; RBL26 PER SRM 51-40-02-0G-0;[04] LOCATED AND DRILLED NEW ACB SUBTHRESHOLD WEB BS790-BS847 RBL 26 PER SRM 51-40-05-0G-0 AND DWG 146A8340 AND DWG 146A8120.<BR>OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION 4.;[06] INSTALLED SUBTHRESHOLD WEB BS790-BS847 RBL 26 PER SRM 51-40-02-0G-0 AND DWG 146A8340 AND DWG 146A8120.;[07] ALL STEPS VERIFIED;[08] VERIFIED CORRECTIVE ACTIONS 6 AND 7.

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