TM 1-1520-238-T-5
8–5
8–2.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)
8–2
(2) TORQUE Indicators.
The TORQUE indicators, located in the pilot and CPG instrument panels, have
a vertical scale above each digital readout. The left scale displays engine 1 torque values and the right scale
displays engine 2 torque values.
(3) Pilot ENG OIL Indicator.
The pilot ENG OIL indicator, located in the pilot instrument panel, has a
vertical scale above each digital readout. The left scale displays engine 1 oil pressure values and the right scale
displays engine 2 oil pressure values.
(4) ENG–RTR RPM% Indicator.
The ENG–RTR RPM% indicators, located in the pilot and CPG
instrument panels, have three vertical scales. The left scale displays engine 1 rpm (Np 1), the middle scale
displays main rotor rpm (NR), and the right scale displays engine 2 rpm (Np 2).
(5) Pilot NG RPM% Indicator.
The NG RPM% indicator, located in the pilot instrument panel, has a
vertical scale display mounted above each digital readout. The vertical scales display 0 to 120% NG. The left
scale displays gas generator rpm% for engine 1 and the right scale displays gas generator rpm% for engine 2.
(6) CPG SDD Panel.
The CPG SDD panel, located in the CPG instrument panel, provides digital readout
of selected pilot instrument data. The CPG SDD TEST function tests the SDD and CPG engine torque instrument
displays and readouts.
(7) Dim/Test Panels.
The dim/test panels, located in the pilot and CPG instrument panels, enable setting
or changing of instrument display brightness, testing instrument displays, and blanking out of digital readouts on
pilot and CPG instruments.
(8) SDC.
The SDC, located in the nose of the helicopter at access station L40, converts 28 VDC into
signal processing voltages and provides power to the fuel signal conditioner and engine torque indicators.
b. Flight Instruments.
Flight instruments (fig. 8–2) consist of the Pitot tubes, static ports, airspeed
indicators, vertical speed indicators (VSI), pilot accelerometer indicator, barometric altimeters, pilot standby
attitude indicator (SAI), CPG remote attitude indicator (RAI), and the pilot magnetic compass.
(1) Pitot Tubes.
The Pitot tubes, located on the leading edge of each wing, supply impact air for flight
instruments.
(2) Static Ports.
The static ports, located on each side of the helicopter, supply static air pressure for
flight instruments.
(3) Airspeed Indicators.
The airspeed indicators, located in the pilot and CPG instrument panels, show
helicopter airspeed in knots. The calibrated airspeed dial reads from 20 to 250 knots.
(4) VSIs.
The VSIs, located in the pilot and CPG instrument panels, display vertical speed (UP or
DOWN). Vertical speeds can be measured to a maximum rate of 6000 feet per minute.
(5) Pilot Accelerometer Indicator.
The pilot accelerometer indicator, located in the pilot instrument
panel, shows positive and negative changes in gravity. Positive gravity forces can be measured up to +4g.
Negative gravity forces can be measured down to –2g.
(6) Barometric Altimeters.
The barometric altimeters, located in the pilot and CPG instrument panels,
display aircraft altitude from –1,000 to 50,000 feet.
