# SDR SWAA2023010975703

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 26, 2022
- Submitted: January 9, 2023
- Operation: Air carrier
- Aircraft: [N439WN](https://openairdocs.org/aircraft/N439WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29834
- Aircraft time: 64,965 hours, 38,601 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Bs 440-492
- 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/SWAA2023010975703

## Discrepancy

CORROSION LOWER SILL LOCATED BS 440 TO BS 492.4 BETWEEN S-26R TO S-25R WL 156 AT FWD CARGO COMPARTMENT 2022-664196<[01] TOOL USED: ULTRASONIC EQUIPMENT; P/N: 45MG; S/N: 130063701; DUE DATE: 16 JUN 23.;[02] REPLACED LOWER SILL LOC ON BS440 TO BS492.4 BTW STR26R TO STR25R AT FWD CARGO COMPARTMENT I.A.W. B737-700 SRM 51-10-02 ITEM 9 AND SRM 51-40-02 AND DWG 143A8330 SHEET 15 REV. A.<BR>SEE INDIVIDUAL SIGN-OFF BELOW;[03] TASK CARD COMPLETED

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