8AMT-1250-00

Pendulum vibration damper 8AMT-1250-00

8AMT-1250-00 is an aircraft pendulum-type vibration damper used on helicopters of the Mi-8 / Mi-17 family. The unit is designed to reduce vibration loads in helicopter structures within a defined frequency range. It works as part of the vibration protection system and helps damp oscillations generated during operation by the powerplant, transmission and main rotor system. Since vibration affects airframe fatigue, crew comfort and long-term structural condition, the damper is an important passive mechanical element in the helicopter’s vibration control arrangement.

Passive damping principle of 8AMT-1250-00

The 8AMT-1250-00 operates on a passive pendulum principle. It is tuned to suppress vibrations in a characteristic frequency zone, including the area around 10 Hz. The design does not require active electronic control or external command input. This gives the unit stable operation under varying flight and ground conditions, provided that it is installed, maintained and tracked according to approved documentation. The damper reacts mechanically to oscillatory movement and reduces the amplitude of vibrations transmitted into helicopter structures.

8AMT-1250-00 in the vibration protection system

The 8AMT-1250-00 is installed as part of the helicopter vibration protection system. Its role is to reduce vibration loading on selected airframe elements and connected structural areas. During operation, the helicopter structure is exposed to repeated oscillations from the main rotor, powerplant and rotating mechanical systems. The pendulum damper helps limit these oscillations in its tuned range. This can reduce fatigue loading on structural components and improve the vibration environment for the crew, especially during sustained flight modes where repeating vibration can be more noticeable.

Aircraft application of the 8AMT-1250-00 damper

The 8AMT-1250-00 vibration damper is used on Mi-8MT, Mi-8MTV, Mi-8AMT, Mi-171, Mi-172 and other helicopters of the Mi-8 / Mi-17 family. Installation location and applicability depend on the helicopter configuration and design documentation. Since aircraft may differ by modification, production series, modernization status and maintenance history, the exact installation should be confirmed through the aircraft documentation and the manufacturer passport of the unit. A damper should be selected by designation, approved interchangeability and recorded service status.

Interchangeability of 8AMT-1250-00

According to manufacturer documentation, 8AMT-1250-00 is interchangeable with 8AT-1250-00 and 8MT-1280-100 within approved service life limits. This means replacement must still consider resource, calendar life, passport records and applicable maintenance procedures. Interchangeability should not be treated as unrestricted unless the unit condition and documentation confirm it. For operational use, the installed damper must match the approved configuration of the aircraft and remain within the recorded life limits stated in its passport and related technical records.

Documentation and lifecycle control for 8AMT-1250-00

Each 8AMT-1250-00 unit is controlled through an original manufacturer passport. The passport records acceptance data, operating time, calendar life, repair status and lifecycle history. These records are important because the damper may be accepted, operated, restored or replaced only within the limits approved by manufacturer and maintenance documentation. Restoration is permitted when carried out according to approved procedures and properly recorded in the passport. For supply, it is useful to specify the helicopter type, required condition, remaining life, interchangeability requirement and passport availability.

Product Type: Aircraft pendulum vibration damper
Designation: 8AMT-1250-00
Alternative Designations: 8АМТ-1250-00, 8AT-1250-00, 8MT-1280-100
Function: Reduction of vibration loads in helicopter structures
Application / Where Used: Helicopter vibration protection system
System / Installation Area: Helicopter structure according to design documentation
Compatible Aircraft / Equipment: Mi-8MT, Mi-8MTV, Mi-8AMT, Mi-171, Mi-172 and other Mi-8 / Mi-17 family helicopters
Operating Principle: Passive pendulum vibration damping
Tuned Frequency: Approximately 10 Hz
Interchangeability / Replaceability: Interchangeable with 8AT-1250-00 and 8MT-1280-100 within approved service life limits
Resource Tracking: Operating time and calendar life recorded in manufacturer passport
Assigned Service Life: Defined in manufacturer passport
Repairability: Restoration permitted according to approved procedures and recorded in passport
Condition: As applicable
Technical Documentation: Original manufacturer passport with acceptance records, operating time tracking and lifecycle records

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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.