# SDR SWAA2024102941552

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 24, 2024
- Submitted: October 29, 2024
- Operation: Air carrier
- Aircraft: [N498WN](https://openairdocs.org/aircraft/N498WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32480
- Aircraft time: 65,864 hours, 39,268 cycles
- System (JASC): [5534 · Vertical Stabilizer Miscellaneous Structure](https://openairdocs.org/jasc/5534)
- Part: Fitting
- Condition: Corroded
- Location: Zone 300
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2024102941552

## Discrepancy

CORROSION FOUND AT VERTICAL FIN FRONT SPAR FITTING LH BOLT HAS PITTING CORROSION.<[01] REMOVED AND REPLACED BOLT AT VERTICAL FIN FRONT SPAR FITTING LH.<BR>REF: AMM 55-30-00-000-801 AND AMM 55-30-00-400-801.<BR>TOOL USED<BR>-TORQUE WRENCH: B/C: 175286; CAL DUE DATE: 07/02/2025.<BR>-TORQUE WRENCH: B/C: 164372; CAL DUE DATE: 06/01/2025.;[02] RII -- VERIFIED STEP 1.

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