IKD27DA-220-780

IKD27DA-220-780 pressure measurement unit overview

The IKD27DA-220-780 is an aircraft pressure measurement unit used in onboard control and monitoring systems. It measures absolute air pressure and converts the measured value into a direct current voltage signal. This makes it useful in circuits where pressure information has to be transmitted in electrical form, not only shown on a local indicator. The unit belongs to the IKD27 family of pressure measuring equipment and is used as part of aircraft instrumentation, automatic control, and correction circuits.

Measurement signal from IKD27DA-220-780

In operation, the unit responds to air pressure acting on its pressure-sensitive element. The mechanical movement inside the sensing part is converted into an electrical signal proportional to the measured pressure. The output signal is then sent to connected onboard systems. Depending on the aircraft architecture, this signal may be used for automatic regulation, operational parameter correction, diagnostics, or flight parameter monitoring. The unit does not control an actuator directly. It supplies pressure data that other equipment uses.

Control and monitoring circuits with IKD27DA-220-780

The IKD27DA-220-780 can work in engine control, altitude correction, and flight parameter monitoring circuits where absolute pressure is part of the control logic. In helicopter systems, such pressure data may be used by automatic control equipment that needs to adjust operation according to altitude or ambient pressure. If the connected system receives an incorrect pressure signal, the fault may be in the pressure unit, wiring, power supply, connector, or downstream control equipment. For maintenance, the whole signal chain should be checked.

Aircraft application of the IKD27DA-220-780 unit

The unit is listed in equipment references for Mi-8, Mi-17, Mi-171, and Mi-171E helicopter families. Open technical and catalog sources also show IKD27DA-220-780 as a pressure measuring complex used in Mi-171E equipment lists and Mi-8 spare parts catalogs. Exact installation depends on the aircraft configuration and the system using the pressure signal. A unit from the same IKD27 family should not be selected only by appearance or range similarity. The required designation must match the aircraft documentation.

Identification and ordering checks for IKD27DA-220-780

Before ordering, the marking on the installed unit should be checked against the aircraft parts catalog, maintenance documentation, or system schematic. The product may appear as IKD-27DA-220-780, IKD27DA-220-780, or IKD27DA 220-780 in supply documents. In Russian documentation, the equivalent designation is ИКД-27ДА-220-780. For a clear request, it is useful to provide the aircraft type, installation location, full part number, and a photo of the marking if available. The product is also known under alternative designation ИКД-27ДА-220-780.

Product Type: Pressure measurement unit
Function: Measurement of absolute air pressure and signal conversion
Application / Where Used: Aircraft pressure measurement and control systems
System / Installation Area: Engine control, flight parameter monitoring, altitude correction circuits
Compatible Aircraft / Equipment: Mi-8, Mi-17, Mi-171, Mi-171E
Working Medium: Air
Measured Pressure Type: Absolute pressure
Measurement Range: 220 to 780 mm Hg
Output Signal: DC voltage 0.8–8 V
Operating Voltage: 27 V DC
Permissible Supply Voltage Range: 24 to 29.4 V DC
Minimum Operating Voltage: 18 V DC
Weight: Not more than 0.65 kg
Technical Documentation: Technical documentation for IKD27DA-220-780

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