BUNPP-V / 1479-V

BUNPP-V / 1479-V in the AP-34B autopilot set

The BUNPP-V / 1479-V is a navigation and flight control amplifier unit used in the AP-34B automatic flight control system of Mi-8 and Mi-17 family helicopters. It works inside the autopilot equipment set, where signals from navigation, attitude and stabilization channels must be amplified, shaped and passed further into the control loop. The unit is not a cockpit control panel and is not handled directly by the crew. Its work happens inside the avionics system, between sensors, autopilot logic and the circuits that send commands toward executive elements.

Signal amplification through the BUNPP-V unit

The main task of BUNPP-V is to receive low-level or conditioned electrical signals and prepare them for further use in the automatic control system. In a helicopter autopilot, this matters because the system must not only detect a deviation, but also send a stable and usable command to the next part of the chain. The unit helps keep channel signals within the required level and shape. If the amplifier works incorrectly, the fault may show up as unstable stabilization, weak command response, incorrect channel behavior or failure during system checks.

BUNPP-V / 1479-V in stabilization channels

Within the AP-34B system, the BUNPP-V / 1479-V is connected with the helicopter stabilization channels. It supports the signal path used for attitude and directional control under the pilot-selected autopilot modes. The unit does not decide which mode the crew selects, and it does not move the controls by itself. It processes and delivers the electrical signal that the system needs after the command has been formed. This makes the amplifier one of the important intermediate blocks between the sensing equipment and the downstream control electronics.

Interaction with Mi-8 and Mi-17 avionics

The BUNPP-V / 1479-V is used on Mi-8, Mi-17, Mi-8AMT, Mi-8MTV-1 and related helicopter variants equipped with the relevant AP-34B configuration. It interfaces with avionics stabilization channels, navigation-related signal circuits and other units of the automatic flight control system. Since Mi-8 family helicopters can differ by modification, wiring standard and equipment set, the amplifier should always be checked against the aircraft documentation. A correct designation alone is useful, but it is not enough without confirming the installed autopilot configuration and connector arrangement.

Power supply and operating environment of BUNPP-V

The unit receives power from the helicopter DC network and from a three-phase AC supply. These supplies are used for the internal circuits and signal paths required by the amplifier. Since the block is installed in the avionics bay, it is protected from direct crew handling but still operates under helicopter vibration, temperature changes and electrical load variations. During inspection, attention is usually given to the housing, connectors, mounting points, wiring condition, insulation resistance, signs of overheating and traces of previous repair.

Identification and alternate names for BUNPP-V / 1479-V

In parts lists, requests and maintenance documents, the same unit may appear under several names: BUNPP-V, 1479-V, BUNPPV, BUNPP-B or the Cyrillic designation БУНПП-В. These variants are usually related to transliteration, database formatting or older document styles. For supply, the safest approach is to compare the marking on the unit with the AP-34B documentation and the manufacturer passport. It is also important to clarify whether the customer needs the amplifier only or a larger autopilot equipment set.

Supply and documentation for BUNPP-V

BUNPP-V / 1479-V is classified as aviation technical equipment. It may be supplied as new, from storage, repaired, overhauled or serviceable equipment depending on availability. Before shipment, the condition, documentation and compatibility with the required helicopter system should be checked. For aircraft use, the passport, serviceability confirmation, storage or repair records and AP-34B documentation are normally requested. If the unit is intended for installation after long storage, bench testing is usually the right step before acceptance.

Product Type: Navigation and flight control amplifier unit
Designation: BUNPP-V 1479-V
Alternative Designations: BUNPP-V; 1479-V; BUNPPV; BUNPP-B
Function: Signal amplification, conditioning and delivery in automatic flight control systems
Application / Where Used: AP-34B automatic flight control systems and avionics stabilization channels
System / Installation Area: AP-34B autopilot set; helicopter avionics bay
Compatible Aircraft / Equipment: Mi-8, Mi-17, Mi-8AMT, Mi-8MTV-1 and related variants depending on AP-34B installation
System Role: Amplification and shaping of navigation, attitude and control signals for downstream autopilot electronics
Interfaces With: Navigation sensors, attitude sensors, AP-34B control circuits, amplifiers, distributors and actuator-control paths depending on configuration
DC Power Supply: 27 ±2.7 V
AC Power Supply: 36 ±2 V, 400 ±8 Hz, three-phase
DC Current Consumption: Not more than 0.45 A
Output Signal per Channel: Not more than 24 V
Insulation Resistance: Not less than 50 MΩ under normal atmospheric conditions
Operating Temperature Range: −60 to +50 °C
Mounting: Avionics bay installation
Weight: Not more than 1.4 kg
Precious Metals Content: Gold and silver according to manufacturer passport
Category: Aviation technical equipment / avionics flight-control module
Condition: As applicable
Technical Documentation: Product passport and AP-34B documentation available upon request

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.