# SDR SWAA2024081517192

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 2024
- Submitted: August 15, 2024
- Operation: Air carrier
- Aircraft: [N8699A](https://openairdocs.org/aircraft/N8699A), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 36923
- Aircraft time: 26,610 hours, 13,112 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Web
- Condition: Corroded
- Location: Zn 100 Fus Lower
- Component: Web, Boeing, UNKNOWN
- 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/SWAA2024081517192

## Discrepancy

CORROSION ON AFT CARGO BAY SUB THRESHOLD WEB BS 787+12 TO BS 827+4 RBL 28 WL 155<[01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 807+2 REMOVED 0.015' IN AN 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 ATS1672 DUE 03/2025.;[02] VERIFIED CORRECTIVE ACTION ENTRY 1.;[03] COMPLETE;[04] REMOVED DAMAGED ACB SUB-THRESHOLD WEB BS787+6 TO BS847; RBL 28; WL 155 PER SRM 51-40-02. FOUND TO BE OUT OF LIMITS PER SRM 53-60-15-1A-1. LOCATED; DRILLED AND INSTALLED REPLACEMENT SUB-THRESHOLD WEB PER DWGS 146A8120; 146A8340 AND SRM 51-40-02-0G-0.<BR>ALL WORK COMPLETE ON TTG8Q00UU869.;[05] VERIFIED CORRECTIVE ACTION 4

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