MPK-13A-5 Series 2

MPK-13A-5 in valve and flap control systems

The MPK-13A-5 is designed to work with controlled elements that have a limited angular travel. The output shaft turns the connected valve or flap through the required angle and stops at the end positions defined by external mechanical stops. This makes the mechanism suitable for equipment where the final “open” and “closed” positions are set by the controlled unit itself. The electromechanism does not require continuous manual adjustment during operation. It receives the command, moves the shaft, and holds the connected element in the required position according to the system layout.

Aircraft use of MPK-13A-5 Series 2

The MPK-13A-5 Series 2 is used in aircraft systems that require remote control of shut-off or regulating elements. It may be applied in fuel, hydraulic, air, ventilation or special onboard systems depending on aircraft configuration. The unit is associated with aircraft such as Tu-154 and Tu-22 applications, and it is also listed as an associated electromechanism in actuator assemblies such as 5395VT. Final applicability should always be confirmed by the aircraft parts catalog, system schematic and the passport of the equipment where the mechanism is installed.

Electric drive and end-position operation of MPK-13A-5

The mechanism is normally equipped with a D-10ARU series DC electric motor. During operation, the motor drives the internal reduction mechanism and turns the output shaft. When the connected element reaches the external rigid stop, the power supply to the motor is switched off. This protects the drive from unnecessary loading at the end of travel and makes the mechanism suitable for repeated open / close commands. The design also provides electrical signaling of the shaft end positions, so the control system can receive confirmation that the commanded position has been reached.

MPK-13A-5 under aircraft operating loads

The MPK-13A-5 is built for aircraft service conditions, where vibration, temperature changes and mechanical loads are part of normal operation. The mechanism must provide enough output torque to move the connected valve or flap while maintaining reliable operation of the motor, gearbox, contacts and position signaling elements. During inspection, attention should be paid to shaft movement, backlash, connector condition, motor current, end-position signaling, mounting points and signs of overheating or mechanical damage. A mechanism that is electrically alive but mechanically stiff may still be unsuitable for installation.

Identification and supply of MPK-13A-5 Series 2

For procurement, repair or replacement, the full designation MPK-13A-5 Series 2 should be stated. It is important to clarify whether the requirement is for the electromechanism itself, a complete actuator assembly, a unit from storage, an overhauled unit or a serviceable item with documents. Since the mechanism may be used as part of different aircraft assemblies, interchangeability should not be assumed by appearance alone. Before installation, the unit should be checked against the controlled valve or flap, connection interface, required angle, shaft load and aircraft documentation.