UR-117M

Engine parameter indication through UR-117M

The indicator displays data related to compressor outlet air pressure, atmospheric pressure and outside air temperature. These parameters are used to assess the current operating mode of the engine under changing flight conditions. Compressor outlet pressure reflects the engine’s internal operating state, while atmospheric pressure and air temperature help correct the indication for the surrounding environment. This allows the crew to read the operating mode more reliably than from a single uncorrected pressure value.

UR-117M with pressure and temperature sensors

The instrument operates with pressure and temperature sensing elements used in the IR-117 / IR-117M measuring chain. Pressure receivers provide compressor outlet and atmospheric pressure data, while the temperature receiver supplies outside air temperature input. The indicator depends on correct sensor signals, wiring condition and power supply stability. If indication is incorrect or unstable, the check should include the connected sensors, pressure lines, electrical connectors, aircraft wiring and the indicator itself.

Aircraft application of UR-117M

UR-117M is used on aircraft equipped with compatible IR-117 or IR-117M systems, including helicopters of the Mi-8 / Mi-17 family depending on configuration. The unit is installed on the left pilot instrument panel where engine mode information is available to the crew during flight. Exact applicability depends on the helicopter modification, engine installation and onboard indication system. Similar aircraft may use different indicator versions, so replacement should be confirmed by the aircraft documentation.

Identification and ordering of UR-117M

Before ordering, the full marking of the indicator should be checked against the aircraft parts catalog, IR-117 / IR-117M documentation or product passport. It is also important to confirm the installed system variant, sensor set and cockpit panel layout. For correct selection, provide the aircraft type, engine type, system designation, existing instrument marking and a photo of the scale or data plate if available. The product is also known under alternative designations UR-117M and УР-117М.