BELL 206 TAIL GEARBOX. In helicopter maintenance, few components carry as much importance—and as

much responsibility—as the tail rotor gearbox. It is a critical cornerstone of directional control, stability, and safety.

For operators of the Bell 206 series, the performance of this gearbox is not simply a matter of mechanical

function—it is a matter of trust.

Today, we present a Bell 206 Tail Rotor Gearbox Assembly, freshly overhaule, documente at 0.0 hours since overhaul,

and supported by a full suite of records, certifications, and completed factory-approved modifications.

Carrying Part Number 206-040-402-003 and Serial Number A-1462, this gearbox represents the kind of

component every operator hopes to secure: a professionally completed overhaul, zero post-overhaul time, and a clean,

traceable service history. With a Total Time Since New (TSN) of 620.0 hours, the gearbox remains well within its operational life,

now reset to zero with its overhaul and ready to re-enter service with renewed strength and reliability. BELL 206 TAIL GEARBOX.

Included with this assembly is a valid FAA Form 8130, the essential certification that verifies airworthiness and

conforms to regulatory expectations. In the world of helicopter maintenance, proper traceability is as

vital as the hardware itself, and this gearbox arrives with the documentation needed for installation approval, fleet tracking,

and maintenance recordkeeping. For operators, technicians, and maintenance facilities, this level of documentation is indispensable.

Beyond the overhaul, this gearbox benefits from key modifications and technical bulletin compliance,

ensuring that it meets the latest performance and reliability standards. Among the completed upgrades are:

BELL 206 TAIL GEARBOX

• Improved Tail Rotor Gearbox Seals
  (TB206-94-150 and TB206-96-164 Rev “A”)
  These seal improvements address known wear points and enhance fluid containment and

• environmental protection, contributing to longer service life and reduced maintenance requirements.

• Gearbox Modification per BHT-206B3-CR&O-4, Rev 7
  This significant revision ensures compliance with Bell’s updated overhaul and operational standards,

• enhancing durability and operational consistency.

These modifications represent not just compliance, but improvement—making this gearbox more robust and better

prepare for the demands of daily helicopter operation.

Because tail rotor gearboxes work under consistent rotational stress, high-precision engineering and

professional overhaul practices are essential. This unit has undergone the proper inspections, component replacements,

and quality-assurance measures necessary to return it to service in a like-new state. With 0.0 TSO, it stands ready for immediate installation,

offering operators the peace of mind that comes from knowing the component is beginning a fresh maintenance cycle.

The include complete documentation and historical service record provide a clear and unbroken chain of maintenance events.

This transparency is vital for anyone installing critical components in commercial, private, or fleet environments.

For Bell 206 operators, an overhaule gearbox with zero time, factory modifications, and full documentation is more than a replacement part—it is an opportunity to enhance aircraft dependability while eliminating uncertainty. Whether supporting a working fleet, maintaining a single private aircraft, or provisioning stock for an aviation maintenance program, this gearbox offers a strong, ready-to-install solution built to meet the demands of the renowned Bell 206 platform.

A fresh overhaul.
A proven history.
A fully compliant, fully documented, flight-critical component—prepared for its next mission.

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