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Lubor Smericka
Lubor Smericka
Lubor Smericka
APU Department


Safír 5K/G MI is an auxiliary power unit designed to deliver compressed air for starting the main engines and to supply AC to the deck network.
  • Simultaneous supply of electric power and compressed air
  • Continuous operation for 6 hours
  • High reliability
  • Purity of the air supplied to the air-conditioning system
  • Long service life
  • Easy maintenance
  • Ecological fuel drainage
  • Optimized operating fluid status signaling
  • Start and operation up to 6,000 m
The compressed air can be used for the environmental control system. The auxiliary power unit contains all the necessary accessories for safe operation and momentary as well as long-term diagnostics of the unit.

The exhaust gas temperature, revolutions and other indicators are constantly monitored. The fuel, oil and oil filter status is also signalled. All data are recorded by the control unit equipped with a RS 422 communication interface. This APU was certified for civil aviation by AR MAK according to AP-VD and by CCA CZ according to TSO-C77b (recognized by EASA).

Auxiliary power unit parameters

Technical parameters SI units Imperial units
Nominal power   20 kVA 20 kVA
Power supply 3x 115 V/200 V/ 400 Hz 3x 115 V/200 V/ 400 Hz
Max. bleed air 28,3 kg/min 62,4 lb/min
Fuel consumption 64 kg 141 lb
Height x width 491 x 520 m 19,3 x 20,3 in
Length 788 mm 31 in
Max. altitude 6 000 m 19 700 ft

Data sheet to download here.

Why us?

Experience with thousands of installations

Experience with thousands of installations

PBS has already implemented thousands of installations of various auxiliary power units used in many aircraft and helicopter projects.
Trouble-free operation even in extreme climatic conditions

Trouble-free operation even in extreme climatic conditions

This auxiliary power unit starts and operates at up to 6,000 m, and it can run continuously for up to 6 hours even under extreme climatic conditions.

Service, spare parts and overhauls of aerospace technology

We provide service of the highest quality for all users of our aerospace technology products.

We have long been working to extend the service life of our products, e.g. by introducing new technologies to produce the most exposed parts. Our turbine-based aicraft equipment regularly receives very good references.