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Table 10–1. Fuel System Controls and Indicators (cont) | Up
TM-1-1520-238-T-7 Army Model AH-64 Helicopter (NSN
1520-01-106-9519) (EIC: RHA) Manual | Next
Table 10–1. Fuel System Controls and Indicators (cont) |
TM 1-1520-238-T-7
10–26
10–6.
CONTROLS AND INDICATORS (cont)
10–6
Table 10–1.
Fuel System Controls and Indicators (cont)
Dim/Test Panel
SWITCH/INDICATOR
POSITION
FUNCTION
DGT OFF/TST/NORM 3-position
spring loaded switch
DGT OFF
Disables digital readouts. Vertical scales continue to
operate normally.
TST
Initiates testing of all vertical scales, illuminates from
bottom to full scale for three seconds. All digital readouts
display 888s.
NORM
Enables normal operation of both vertical scales and
digital displays.
DIM variable control
Allows instrument intensity to be adjusted.
M70-234A
DGT OFF / TST / NORM
SWITCH
DIM CONTROL
Dim/Test Panel
NITROGEN INERT MONITOR Indicator
SWITCH/INDICATOR
POSITION
FUNCTION
Indicator
Black (OK)
Lights when nitrogen to oxygen mixture is at appropriate
level.
Black and white
(FAIL)
Lights when more oxygen than nitrogen is present in fuel
cells.
PRESS TO TEST switch
Simulates failure of NIU.
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