Bell Helicopter 206 Tail Rotor Gearbox (TRGB) – Overhauled | P/N 206-040-400-011 | Serviceable Condition

Bell 206 Tail Gearbox. Maintain dependable anti-torque performance and tail rotor system reliability with

this Bell Helicopter 206 Tail Rotor Gearbox (TRGB), part number 206-040-400-011, serial number ALO-10445.

This unit has been professionally overhauled, is in very good, preserved condition, and is offered as a

serviceable, installation-ready component for operators and maintenance facilities supporting the Bell 206 fleet.

The tail rotor gearbox is one of the most critical dynamic components in the rotorcraft drivetrain. It transfers power from the

tail rotor driveshaft to the tail rotor hub assembly, enabling precise yaw control and stable directional authority in all phases of flight.

A properly maintained TRGB ensures smooth torque transmission, controlled tail rotor RPM, and reliable

operation under varying power and flight conditions.

Bell 206 Tail Gearbox

Designed for Bell Helicopter 206 Platforms

This gearbox is specified for the Bell 206 series, including A, B, and L variants (always verify applicability per aircraft IPC and

maintenance data). The Bell 206 platform is widely known for its versatility across training, utility, corporate, and

law enforcement operations. Because these aircraft often operate in high-cycle environments, having a properly

overhauled tail rotor gearbox is essential to sustaining drivetrain integrity and flight safety.

The TRGB operates under continuous mechanical load, transmitting rotational energy through gears and bearings that must

withstand vibration, torque variations, and environmental exposure. Overhauled units that have been inspected,

reconditioned, and preserved provide confidence in continued performance and longevity.

Bell 206 Tail Gearbox

Condition, Overhaul Status & Documentation

• Part Number: 206-040-400-011
• Serial Number: ALO-10445
• Condition: Overhauled
• Status: Serviceable
• Documentation Included: Commercial Historical Service Record
• Physical State: Clean, preserved, and ready for installation

The included historical service record adds valuable traceability, helping maintenance teams verify prior service activity and component history. Proper preservation further supports readiness for installation and reduces the risk of corrosion or contamination prior to fitment.

Bell 206 Tail Gearbox

Critical Role in Flight Operations

The tail rotor gearbox directly influences:

• Yaw authority and directional control
• Tail rotor speed stability
• Drivetrain efficiency and vibration levels
• Overall rotorcraft handling quality

Failure or degradation of TRGB components can significantly affect flight characteristics, making the use of overhauled, serviceable assemblies a priority for responsible maintenance planning.

Ideal Applications

This gearbox is well suited for:

• Scheduled tail rotor drivetrain replacement
• Fleet maintenance support
• Repair stations specializing in Bell helicopters
• Operators maintaining spares inventory
• Restoration or refurbishment of Bell 206 aircraft

A Reliable, Installation-Ready Solution

It combines overhaul status, preserved condition, and documented service history—making it a strong option for operators seeking a dependable replacement component. With its serviceable classification and readiness for installation, it supports continued safe and efficient operation of Bell 206-series helicopters across a range of missions and operating environments.