# SDR SWAA2023070563506
- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 25, 2023
- Submitted: July 5, 2023
- Operation: Air carrier
- Aircraft: [N440LV](https://openairdocs.org/aircraft/N440LV), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29835
- Aircraft time: 66,389 hours, 39,384 cycles
- System (JASC): [5530 ยท Vertical Stabilizer](https://openairdocs.org/jasc/5530)
- Part: Fitting
- Part number: UNKNOWN
- Condition: Corroded
- Location: Zn 300 Stabilize
- 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/SWAA2023070563506
## Discrepancy
VERTICAL FIN FRONT SPAR FITTING AT STA 1016 L/H BOLT HAS A SPOT OF CORROSION.<[01] REMOVED AND REPLACED VERTICAL FINFRONT SPAR FITTINGAT STA 1016 L/H BOLT AS PER AMM 55-30-200-801 TORQUE WRENCH
BC 175291
DUE DATE: 11/18/23;[02] REMOVED AND REPLACED VERTICAL FINFRONT SPAR FITTINGAT STA 1016 L/H BOLT PENDING SLING ASSEMBLY REMOVAL AS PER AMM 55-30-200-801 TORQUE WRENCH
BC 175291
DUE DATE: 11/18/23;[03] REMOVED AND REPLACED VERTICAL FINFRONT SPAR FITTINGAT STA 1016 L/H BOLT AS PER AMM 55-30-200-801 TORQUE WRENCH
BC 175291
DUE DATE: 11/18/23;[04] CORRECTION: REMOVED AND REPLACED VERTICAL FIN FRONT SPAR FITTING AT STA 1016 L/H BOLT AS PER AMM 55-30-200-801.
TORQUE WRENCH USED: BC 175291 CAL DUE DATE: 11/18/23;[05] CORRECTION: REMOVED AND REPLACED VERTICAL FIN FRONT SPAR FITTING AT STA 1016 L/H BOLT AS PER AMM 55-30-200-801. SLING REMOVED.
TORQUE WRENCH USED: BC 175291 CAL DUE DATE: 11/18/23;[06] VERIFIED STEP 5 BOLT REPLACED.
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