APD-75A

APD-75A System Overview

The APD-75A is an electromechanical engine start automatic control unit designed for automated control of start processes of single-shaft gas turbine engines within aircraft and ground power installations. The unit functions as a programmed control device integrated into engine start system architecture.

APD-75A Control Function

The device controls the sequence of activation and deactivation of start system components, including starter-generator operation, ignition systems, and fuel supply, ensuring execution of the start cycle according to a predefined timing program and transition to normal engine operation.

APD-75A Aircraft and Ground Application

The unit is used in aviation and energy applications, including aircraft such as An-12, Il-18, and Il-38 equipped with AI-20 engines, as well as ground-based gas turbine power plants such as PAES-2500.

APD-75A System Integration

The control unit operates in conjunction with onboard or ground engine systems, using a cam-based programmed mechanism to generate control signals for ignition units, fuel valves, and starter systems. The product is also known under alternative designations APD-75A and АПД-75А.

Product Type: Electromechanical programmed engine start control unit
Function: Automatic control of engine start sequence
Application / Where Used: Aircraft and ground gas turbine engine start systems
System / Installation Area: Engine start control system (AI-20; PAES-2500)
Compatible Aircraft / Equipment: An-12, Il-18, Il-38; PAES-2500 installations
Operating Voltage: 27 V DC (24–30 V)
Control Type: Electromechanical (motor, gearbox, camshaft, contact groups)
Cycle Duration: Approximately 90 s
Operating Sequence: Starter-generator activation; ignition and fuel supply; shutdown of ignition; disconnection of starter; transition to idle
Timing Stages: Multi-stage programmed timing with fixed intervals for each operation
Operating Temperature Range: −60 to +60 °C
Construction Type: Cam-based programmed device with relay logic
Mounting Type: Panel or cabinet installation with vibration protection
Interface: Standard electrical connectors
Weight: Approximately 2.5–3 kg
Modern Replacement: Can be replaced by programmable electronic controllers with equivalent timing logic
Technical Documentation: Product passport and operational documentation

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.