TM 55-4920-328-13
Table 2.5. Function of Controls and Indicators - - Continued
INDEX AND
REFERENCE
FIGURE NO.
NOMENCLATURE
DESIGNATION FUNCTION OR INDICATION
OPERATOR'S SUB-MODULE (figure 1-24)-Continued
29, figure
HOT AIR OPEN/
3A3S1
Used as a dual function switch to open
1-24
HOT AIR CLOSED
and close the hot air valve on an engine
Switchlight Unit
under test.
30, figure
ENGINE FUEL
3A3S10
Used to open and close the fuel shut-
1-24
SOLENOID
off solenoid valve in the fuel system.
Switchlight Unit
26, figure
OSG BLEED OPEN/
3A3S3
Used as a dual function switch to open
1-24
OSG BLEED CLOSED
and close the overspeed governor on an
Switchlight Unit
engine under test.
27, figure
P1 AIR Switchlight
3A3S12
Used to open and close the solenoid
1-24
Unit
valve in the data acquisition assembly
in the P1 air circuit.
25, figure
AUTO FUEL/
3A3S4
Used as a dual function switch to control
1-24
EMERG FUEL
normal and emergency fuel sup-
Switchlight Unit
plied to an engine.
21, figure
FUEL HTR VALVE
3A3S6
Used a dual function switch to open
1-24
OPEN/FUEL HTR
and close the fuel heater valve.
VALVE CLOSED
Switchlight Unit
22, figure
NII SPEED CON-
3A3S15
Used to energize the NII speed controller-
1-24
TROL PWR ON
for a T64-16 engine.
Switchlight Unit
28A, figure
T73 OVERSPEED
3A3S11
Used to provide overspeed switch
1-24
Switchlight Unit
check-out when testing the T73 P-700
engine.
Change 2 2-28
