558 ARP Commences Production of a New Fighter Aircraft Maintenance Unit

As part of its import substitution programme, JSC 558 Aircraft Repair Plant has commenced production of the ICFG.04.3791 active fuel supply unit (UPAT), designed for workshop use within the overhaul and repair process.

This is a critical part of the aircraft’s fuel system, comprising components and pipework that supply fuel to drive jet (motive-flow) and hydro-turbine pumps. The unit pressurises fuel in the active fuel line and enables the fuel sequence/feed-out logic to be tested on Su-27, Su-30, and MiG-29 fighter aircraft.

In fighter aircraft, this feed line automatically transfers fuel from the wing and auxiliary/remote tanks to the collector tank, ensuring an uninterrupted fuel supply to the engines in any flight attitude and during high-G aerobatic manoeuvres.

Key Technical Specifications:
• Mass: 1,700 kg
• Supply voltage: 380 V (50 Hz)
• Rated current: 100 A
• Maximum active power: 65 kW
• Maximum discharge line pressure: 2.2 MPa
• Flow rate (Mode I): min. 36 m³/h
• Flow rate (Mode II): min. 28 m³/h

The unit developed by JSC 558 ARP is considerably more cost-effective than its existing market equivalents.