6S2.390.125-4

Control function of the 6S2.390.125-4 panel

The 6S2.390.125-4 panel provides a cockpit interface for roll and heading control within the automatic flight control system. Through this panel, control inputs are transferred to the relevant stabilization and autopilot channels. The unit does not operate as an independent flight control computer; it functions as part of the complete control system installed on the helicopter. Correct operation depends on the condition of the panel mechanism, electrical connections where applicable, cockpit installation, associated indication units and the aircraft’s automatic control system configuration.

6S2.390.125-4 in Mi-26 flight control architecture

On the Mi-26 helicopter, the 6S2.390.125-4 is integrated into the cockpit control layout and supports the aircraft’s stabilization and autopilot functions. The Mi-26 is a heavy rotorcraft platform, so control system components must operate reliably under vibration, temperature variation and flight loads. The panel is intended for standard cockpit installation in accordance with the aircraft maintenance documentation. During maintenance or replacement, the unit should be checked against the aircraft equipment list, wiring diagrams, installation drawings and relevant control system documentation.

Mechanical design of 6S2.390.125-4 Series 4

The 6S2.390.125-4 Series 4 is described as a mechanical control panel / cockpit control unit. Its construction is intended for aviation use and continuous operation in demanding helicopter conditions. The unit must provide stable mechanical input transfer and reliable interaction with the connected control channels. Since it is used in the cockpit control system, attention should be paid to switch movement, mechanical play, mounting security, connector condition, markings, panel condition and compliance with the required aircraft configuration.

Application for operators and MRO support

The 6S2.390.125-4 control panel may be required by helicopter operators, MRO organizations and spare parts distributors involved in Mi-26 maintenance, overhaul, modernization or fleet restoration programs. The unit can be requested for replacement of a defective panel, creation of repair stock or support of cockpit control system restoration. Because aircraft control system installations may differ by helicopter serial number, maintenance history and configuration, applicability should be confirmed before supply using the aircraft documentation and part number reference.

Identification and ordering of 6S2.390.125-4

Before ordering 6S2.390.125-4 Series 4, the required condition, documentation set and aircraft configuration should be confirmed. The unit may be supplied in New, As-Stored, Overhauled or Serviceable condition depending on availability and customer requirements. For correct supply, it is useful to specify the full part number, series, aircraft type, required certification documents, warranty conditions, packaging requirements and whether pre-shipment inspection is needed. Export packing, logistics and documentation support may be arranged according to the terms of supply.