BVK 2.761.589

BVK 2.761.589 in the Kurs MP-70 system

The BVK 2.761.589 is a built-in test unit used in the Kurs MP-70 onboard navigation and landing system. It belongs to the aircraft radio-electronic equipment set and is used to check whether the navigation and landing channels respond correctly before or during operation. This is not a navigation receiver and not a cockpit indicator. It is a control and verification unit that helps the crew or maintenance personnel confirm that the connected Kurs MP-70 equipment is working as expected.

Testing role of BVK 2.761.589

In normal use, the unit sends control signals into the course and glide path channels of the navigation and landing system. These signals allow the system response to be checked without relying only on an external radio beacon. The BVK unit is useful during ground checks, scheduled maintenance, and functional checks after component replacement. It helps verify how the receiver, indication circuits, and cockpit displays react to centered and deviation commands. If the indication does not match the expected response, the fault may be in the receiver path, wiring, indicator circuit, or related control equipment.

Course and glide path checks through 2.761.589 BVK

The BVK 2.761.589 works with the parts of the MP-70 system that handle course and glide path information. In practice, it simulates the type of command that the system must read during approach guidance. The unit can be used to check centered indication and directional deviation, including left, right, up, and down commands. This is a practical function, not a standalone measuring system. The final result still depends on the connected receiver blocks, cockpit indicators, cable harnesses, and the actual aircraft wiring.

Aircraft application of BVK 2.761.589

The unit is used on aircraft fitted with the Kurs MP-70 navigation and landing system. Typical applications include An-24, An-26, Yak-40, Tu-134, Il-76 and other aircraft where MP-70 equipment is installed. The exact installation may differ by aircraft type, production series, and overhaul history. Some aircraft retain the original MP-70 layout, while others may have modified panels, replaced indicators, or updated wiring. For this reason, the BVK unit should be checked against the aircraft documentation before installation or replacement.

System links and identification of BVK 2.761.589

The BVK 2.761.589 operates together with MP-70 receiver units, cockpit course and glide path indicators, control circuits, and aircraft wiring. It does not replace any of these blocks. It only provides the test function used to check how they respond. Before ordering, the part marking should be compared with the aircraft parts catalog, product passport, or maintenance documentation. A photo of the data plate is useful when the aircraft has mixed or overhauled avionics. The product is also known under alternative designation БВК 2.761.589.

Product Type: Built-in test unit / airborne radio-electronic equipment
Function: Functional testing of navigation and landing system channels
Application / Where Used: Aircraft navigation and landing systems
System / Installation Area: Kurs MP-70 onboard system
Part of System / Included in Set: Kurs MP-70 navigation and landing equipment
Compatible Aircraft / Equipment: Aircraft equipped with Kurs MP-70, including An-24, An-26, Yak-40, Tu-134, Il-76
Operating Frequency Range (Course Channel): 108.10 to 111.90 MHz
Operating Frequency Range (Glide Path Channel): 329.15 to 335.00 MHz
Control Signals: Center signal; deviation signals left/right, up/down
Centering Error (Course Channel): Not more than ±5 μA
Centering Error (Glide Path Channel): Not more than ±10 μA
Operating Voltage: 27 V DC; 24 to 29.4 V permissible
Operating Temperature Range: −60 to +60 °C
Operating Altitude: Up to 20,000 m
Dimensions: Approx. 250 × 150 × 60 mm
Weight: Approximately 1.5 to 2.0 kg
Technical Documentation: Product passport and technical documentation

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