95-24 Altimeter
The sensitive altimeter provides altitude information relative to mean sea level when the
barometric pressure correction scale is properly set. Check altimeter calibration by setting
correction scale to the current altimeter setting and checking the altimeter reading against
location elevation; they must agree within 70 feet.
95-25 Torquemeter
The electronic torquemeter indicates percent torque. The torque sensor is an oil pressure
transducer mounted on the front of the engine's accessory gearbox.
95-26 Magnetic Compass
An internally illuminated, wet-type compass is attached to the center bow between the
windshields above the instrument panel. A compass correction card is aft of the windshield
above the pilot's seat.
95-30 Engine Gages
95-31 N1 Tachometer
The electronic N1 tachometer indicates percent RPM of the engine's gas producer section.
The N1 sensor is a sealed variable-reluctance, permanent-magnet device mounted atop the
engine's accessory gearbox adjacent to the hoisting lug.
95-32 Measured Gas (Turbine) Temperature (MGT) Gage
The measured gas temperature (MGT) gage connects to the engine's thermocouple harness
via different size connectors to ensure correct polarity. Refer to RR300 Series Operation
and Maintenance Manual (OMM) for periodic calibration requirements.
95-33 Engine Oil Pressure Gage
The engine oil pressure gage is electronic. The oil pressure sensor is a transducer mounted
on the lower front of the engine's accessory gearbox.
95-34 Engine Oil Temperature Gage
The engine oil temperature gage is electronic. The oil temperature sensor is a transducer
mounted on the inboard wall of the oil tank.
95-35 Fuel Quantity Gage
The electric fuel quantity gage indicates relative fuel quantity. The variable resistance
sender is mounted near the fuel cap.
DEC 2014 Chapter 95 Instrument System Page 95.7
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