T-45A UJPT, E2-C2, ADV, & IUT Eng-26
Engineering Review
(2) Displayed indexer flashes when
hook is not down with landing gear
down and the HOOK BYPASS
switch in carrier position
c.
Controls/switches/indicators
(1) Dimming control mounted left of
indexer light display, both cockpits
(2) Press-to-test button located on top
of indexer used for lamp test
d.
Subsystem interfaces
(1) Power: 28 VDC essential services
bus through forward AOA indicator
(2) The indexer flashes when HOOK
BYPASS switch is in carrier mode
and hook is not down; controlled
by AOA flasher unit in lower equip-
ment compartment and HOOK
BYPASS switch in fwd cockpit
C.
Independent systems
1.
Standby attitude indicator (AI): indicates
aircraft attitude in pitch and roll
a.
Powered by 28 VDC essential services
bus
b.
Provides up to 3 minutes (3-inch AI) or
9 minutes (2-inch AI) attitude
information after total electrical failure
c.
Requires a 30-second warmup prior to
caging
2.
Standby magnetic compass: provides
standby magnetic heading information; also
known as the wet compass
(8-03) Original
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