T-45A UJPT, E2-C2, ADV, & IUT Eng-26
Engineering Review
(2) Electrical system after AFC 246
(a) 115 VAC essential services
bus
(b) 28 VDC essential services
bus powers ICS function and
rate-of-return transmitter
(3) ADI fail switch on NAV TRNG
panel in fwd cockpit used to fail aft
ADI for training purposes
6.
Horizontal situation indicator (HSI)
Sg 8, fr 3
a.
Function: displays heading, radial/
magnetic course, course deviation,
range, TO/FROM indications, and
glideslope and localizer azimuth
displays as selected by TACAN, VOR,
and ILS systems through following
indicators
HORIZONTAL SITUATION INDICATOR
(HSI)
(1) Heading marker bug
(2) Course window
(3) Range indicator with flag
(4) No. 1 and 2 bearing pointers
indicate bearing/radial of VOR and
TACAN
(5) Course deviation indicator (CDI)
indicates deviation from a TACAN,
VOR course, or ILS localizer (CDI
input selected by COMM/NAV
control transfer switches)
(6) Glideslope (GS) pointer
(7) Four warning flags
Page 26-71
(8-03) Original
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