T-45A UJPT, E2-C2, ADV, & IUT Eng-26
Engineering Review
(a) OFF flag indicates power loss
to HSI, fault in HSI internal
power supply, or invalid
information from SAHRS
(b) With ILS selected, GS flag
indicates unreliable GS signal
(c) NAV flag indicates invalid or
absent signal from selected
TACAN, VOR, or ILS
transmitter (depends on
navaid selected to power CDI)
(d) TACAN range warning flag (a
horizontal bar over numbers)
indicates invalid DME signal
or TACAN system - OFF
(8)
Course pointer
(9)
TO/FROM flags
(10) Deviation scale
(11) Compass card
(12) Lubber line
(13) Aircraft symbol
b.
Subsystem interfaces
(1) Power
(a) 115/26 VAC essential buses
(b) 28 VDC generator bus
(course synchro)
(2) Receives heading information from
SAHRS
(8-03) Original
Page 26-72
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