246-1517-000

246-1517-000 System Overview

The 246-1517-000 tail gearbox is a transmission unit designed to transfer torque from the helicopter powertrain to the tail rotor and ensure stable operation of the anti-torque system. It provides redirection of rotational power and supports controlled operation of the tail rotor assembly.

246-1517-000 Transmission Function

The gearbox transmits torque, reduces rotational speed and changes the direction of power flow to enable effective tail rotor control. It operates under continuous load conditions, maintaining stable performance during vibration, temperature variations and extended flight cycles.

246-1517-000 Aircraft Application

The unit is installed on helicopters of the Mi-family, including Mi-8, Mi-8MT/17, Mi-8AMT/171, Mi-8MTV/172, Mi-14 and Mi-24/25/35, as part of the tail rotor drive and control system.

246-1517-000 System Integration

The gearbox incorporates a bevel gear arrangement with angular power transmission, an integrated housing for tail boom installation, and an internal lubrication system designed for thermal load endurance and continuous operation. The product is also known under alternative designations 246-1517-000, 2461517-000, 246-1517-00, 2461517000.

Product Type: Tail gearbox
Function: Transmission of torque to the tail (anti-torque) rotor
Application / Where Used: Mi-8, Mi-17, Mi-171, Mi-8AMT/MTV, Mi-14, Mi-24/25/35 helicopters
System / Installation Area: Tail rotor drive and transmission system

Gear Ratio: 0.4318
Oil Type (Standard): TS-GIP per OST 3801260-82
Oil Type (Winter): Mixture of ⅓ AMG-10 + ⅔ TS-GIP
Fill Oil Capacity: 1.6 kg

Continuous Oil Temperature Limit: +110 °C
Short-Term Oil Temperature Limit: +115 °C

Mass (Passport): 58.7 +0.5 / −0.8 kg
Measured Mass (Factory Record): 58.2 kg

Interchangeability: With 8АТ-1730-000 after modification per bulletin M-466DM
Precious Metals: None
Material Composition: Aluminum ~1.0 kg; magnesium ~17.4 kg

Documentation: Factory passport and service/overhaul documentation available

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.