Air Starter Unit (ASU)

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100 / 160-180 / 250-300 / 400 PPM

ASUs are used for starting aircraft engines equipped with pneumatic starter. It supplies necessary quantity of air at specified pressure through one/two or three hoses attached to the aircraft's under belly.

Available in Towable Trailer mounted / Skid Mounted / Self propelled configurations



  • Highly reliable Cummins  / Deutz / Detroit diesel/ equivalent diesel engines
  • Digital micro controller based system, Operation through GUI touch screen
  • The airflow is automatically adjusted to cater to any type / capacity of aircraft to be started
  • On-Demand throttle for fuel efficient operation
  • Meets latest EPA norms
  • Walk Away – Protection and Control (Unattended Operation)
  • Low Noise level
  • Meets MIL and ARP Standards
  • MAK’s Remote Diagnosis and Monitoring System(Optional)

Technical Specification

Performance specifications for pneumatic power

Quality of Air: Oil free
Flow rate: 100/180/270/300/400 PPM (Maximum) at suction pressure of 14.5 psia and suction temperature of 68°F (20°C)
Discharge pressure: 40 psig
Discharge temperature: 392°F (200°C) working
OAT: -22°F to +118°F (-30°C to + 48°C)
Altitude: Up to 3,000 ft

AC Pack (when used with onboard ECS)

Flow rate: 100/180/270/300/400 PPM (Maximum) at suction pressure 14.7 psia and Suction temperature of 77°F (25°C)
Discharge pressure: 30 psig

Operates in any weather conditions including rain, snow, hail, fog, wind, sand & dust.


Make: Cummins / Deutz / Detroit diesel / Equivalent Diesel Engine
Speed Regulation: Through electronic governor
Electrical system: 24 V DC


Make: MAK / GHH-RAND / equivalent
Type: Oil free screw compressor with integrated step up gearbox
Flow rate: 100/180/270/300/400 PPM at suction pressure of 14.5 psia suction temperature of 68°F (20°C)
Discharge pressure: 40 psig at a discharge temperature of 392°F (200°C)

Coupling System

Coupling Flexible with integral housing.
Regulation: Electro pneumatic

Variable flow and a constant pressure of 2.76 bar (40 psig) are achieved by control of engine speed and the output air through a pressure regulating valve. This makes the ASU versatile and universal in its application to be able to start all aircraft requiring up to 100/180/270/300/400 PPM for starting.

Mode Setting: Air Start / AC Pack


Following parameters are displayed through GUI touch screen.

  • Engine oil pressure
  • Engine coolant temperature
  • Engine rpm
  • Engine hours run
  • Real time
  • Delivery air pressure
  • Delivery air temperature
  • Battery charging current
  • Fuel level

Protections *

A. For Engine

  • Low lube oil pressure shutdown
  • High coolant temperature shutdown
  • Over speed shutdown
  • Under speed shutdown

B. For Compressor

  • Low lube oil pressure shutdown
  • High lube oil temperature shutdown

C. For System

  • High delivery air temperature shutdown
  • High delivery air pressure (relieving to atmosphere)

*Engine Shutdown is De-activated during AST mode operation

Note: Due to continuous development, dimensions, layout, configuration and specifications are subject to change without notice.