4639002011
GEARBOX
Specifications
- Part Number
- 4639002011
- Manufacturer
- BOLKMS
- ATA ChapterMaintenance system chapter
- 65 — Tail Rotor Drive
- CapabilitySystem area (hydraulics, avionics, landing gear…)
- Engine Accessories
- Inventory ClassRotable, expendable, or consumable
- Rotable
- Certification
- OEM
- Aircraft Category
- General-Aviation
- Criticality
- Critical
Service Reliabilityfrom FAA SDR (Service Difficulty Reports)
—
Component-change rate (FAA K-code)
- SDR reports
- 1
- Replace events
- 1
- Repair events
- 0
- K-code events
- 1
Reporting window 2023-06-23 – 2023-06-23Dominant chapter ATA 65
Directional indicator only. Reflects what operators reported to the FAA when a difficulty was logged — not a fleet-normalized failure rate or a cost-based BER. Use alongside operator-specific data.
Airframe Applicability(1)
Data Sources(1)
- 2026-03-07
Quick Facts
Airframes1 applicable
AlternatesNone recorded
ClassRotable
CriticalityCritical
CategoryGeneral-Aviation
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