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Lubor Smericka
Lubor Smericka
Lubor Smericka
APU Department


Safír 5K/G MIS 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 signalling
  • 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 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.

Auxiliary power unit parameters

Technical parameters SI units Imperial units
Nominal power   6 kW 6 kW
Power supply 28 V DC 28 V DC
Max. bleed air 28,3 kg/min 62,4 lb/min
Weight 57 kg 125,6 lb
Height x width 468 x 524 mm 18,4 x 20,6 in
Length 819 mm 32,2 in
Max. altitude 6 000 m  19 700 ft

Data sheet to download here.

Why us?

Significantly better parameters than those of similar competing products

Significantly better parameters than those of similar competing products

This auxiliary power unit operates at up to 6,000 m, and it can run continuously for up to 6 hours.
Long TBO times

Long TBO times

The reliable operation and 3,000 startups of this auxiliary power unit allows for a long time before an overhaul.

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.