T-45C TS, ADV & IUT ENG-27/ENG-28
Engineering Review
(a) TACAN steering selected on HSI
display
(b) 180 course set on HSI
The following should occur:
(c) The TACAN bearing pointer and digital
bearing will indicate 180 + 2.5 degrees
(d) Range will read 0 + 1 NM
(e) The CDI bar will be centered
(f)
The indications of a valid TACAN BIT
test are: TACAN bearing pointer and
digital bearing - 180 + 2.5 degrees -
Range reads 0 + 1 NM - CDI centered
c.
Aircraft Interfaces - TACAN System
(1) Power
(a) 28 VDC essential services bus:
TACAN RT, control panels, COMM
control panels
(b) 115 VAC essential services bus:
TACAN
(c) 26 VAC essential bus: TACAN RT,
control panels
(2) Inputs
(a) RF TACAN magnetic bearing and
distance measurement signals
(b) Fwd/aft navigation selection option in
HSI display signals RT as to which
cockpit has control
(9-98) Original
Page 27-118
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