# SDR SWAA2023041214154

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 8, 2023
- Submitted: April 12, 2023
- Operation: Air carrier
- Aircraft: [N956WN](https://openairdocs.org/aircraft/N956WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36672
- Aircraft time: 38,869 hours, 23,696 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Web
- Condition: Corroded
- Location: Zn 100 Fus Lower
- 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/SWAA2023041214154

## Discrepancy

FWD CARGO BAY - CORROSION ON THRESHOLD WEB AT WL 156 - RBL 28.5 BS 480+1; BS 480+3.5; BS 480+4.5. / RBL 29.5 BS 440+5; BS 480+5.<[01] REMOVED CORROSION FROM MULTIPLE LOCATIONS. EVALUATED BLENDS; DEEPEST BLEND IS AT BS440+5 1.5 X .75 D .025. ORIGINAL THICKNESS IS .050. BLEND IS OUT OF LIMITS. IAW SRM 53-30-15 CAL TOOL ID: ATS2566 S/N 00991 EXP 2/29/24;[02] VERIFIED CORRECTIVE ACTION 1 AND MEASUREMENT TABLE;[03] FAULT RESOLVED ON TTG8Q00JDZML;[04] UPDATED TABLE PARAMETERS;[05] CORRECTION FOR CORRECTIVE ACTION 3- FAULT RESOLVED ON TTG8Q00JE2P7;[06] VERIFIED CORRECTIVE ACTON 5

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