# SDR SWAA2023012786259

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2022
- Submitted: January 27, 2023
- Operation: Air carrier
- Aircraft: N7812G
- Make and model: Boeing 737-76N
- Registry model: [Boeing 737-76N](https://openairdocs.org/model/boeing-737-76n) (OpenAirDocs)
- Aircraft serial: 32582
- Aircraft time: 56,870 hours, 33,864 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Web
- Condition: Corroded
- Location: Bs 456-475
- 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/SWAA2023012786259

## Discrepancy

CORROSION ON SUBTHRESHOLD WEB AT FWD CARGO BAY BS456 - BS475 RBL28. MARKED<[01] EVALUATED CORROSION ON WEB; FOUND DEEPEST LOCATION AT BS 462 RBL 28 WL 156; FOUND 0.020 REMOVED FROM ORIG 0.045 IN NUMEROUS 1'X1' AREAS; FOUND TO BE OUT OF LIMITS PER SRM 53-30-15-1A-1 USING DIAL DEPTH GAUGE ATS 2473 DUE 08/2023;[02] LOCATED; DRILLED; DEBURRED AND INSTALLED NUT PLATES ON NEW SUBTHRESHOLD WEB BS 440-492 RBL 28 PER SRM 51-40-05-0G-0; SRM 51-40-02-0G-0; DWG 143A8330.;[03] VERIFIED CORRECTIVE ACTION 1 AND 2 AND MEASUREMENT TABLE

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