TM 55-1510-215-10
d. Oil Pressure Indicators. Two gages on the
upper-center section and vertically on the pilot's side of
instrument panel register oil pressure in PSI as taken
the instrument panel.
from the delivery side of the main oil pressure pump
a. Interstage Turbine Temperature Indicators. Two
transmitter installed on the respective engine. Both
interstage turbine temperature (ITT) gages on the
instruments are protected by a single, 1-ampere circuit
instrument panel are calibrated in degrees celsius units
breaker, placarded OIL PRESS, on the copilot's circuit
breaker panel (fig. 2-19).
probes located in the hot gases between the turbine
wheels. The ITT gages register the temperature present
e. Oil Temperature Indicators. One oil temperature
between the compressor turbine and power turbine for
gage on the instrument panel is provided for each
the corresponding engine.
engine (fig. 2-22). These instruments are connected to a
b. Engine Torquemeters. Two torquemeters on the
thermal sensor unit attached to the respective engines.
Each gage registers oil temperature in C as it leaves
the delivery side of the oil pressure pump. Both gages
shafts of the respective engines (fig. 2-21). Each gage
are protected by a single 5-ampere circuit breaker,
shows torque by foot-pound measure using 100 pound
placarded OIL TEMP IND, on the right subpanel
graduations and is actuated by an electrical signal from
a pressure sensing system located in the respective
propeller reduction gear case.
Torquemeters are
f. Fuel Flow Indicators.
Two gages on the
protected separately by a 1-ampere circuit breaker,
instrument panel register the rate of flow for consumed
placarded TORQUEMETER LH, RH, on the copilot's
fuel as measured by sensing units coupled into the fuel
circuit breaker panel (fig. 2-19).
supply lines of the respective engines (fig. 2-22). The
fuel flow indicators are calibrated in increments of
hundreds of pounds per hour.
Both circuits are
instrument panel register compressor turbine RPM (N1)
protected by a single, 1-ampere circuit breaker,
for the respective engine (fig. 2-22). These indicators
placarded FUEL FLOW, on the copilot's circuit breaker
register turbine RPM as a percentage of maximum gas
panel (fig. 2-19).
generator RPM.
Each instrument is slaved to a
tachometer generator attached to the respective engine.
2-20 Change 5
