T-45C TS, ADV & IUT ENG-27/ENG-28
Engineering Review
(b) On aircraft 165457 and up and on
aircraft 165456 and below with AFC
199 incorporated
(i)
Both inverters remain on-line and
AC INV caution does not work
(ii) Activates relay disconnecting non-
essential AC bus
(c) C AUG caution light (airspeed (less
than 217 knots), F PRES caution light
(after 30 sec) illuminate and right MFD
disabled
(2) Overvoltage: If generator output exceeds
30.2 VDC, overvoltage unit takes generator
off-line, creating an undervoltage condition
and indications as described above
(3) Generator reset: reset may be attempted
by moving generator switch momentarily to
GEN RESET
b.
Verifications
(1) Voltmeter reads 24 volts or less
(2) Loss of generator bus equipment
(3) Loss of nonessential services
c.
Effects on flight safety
(1) If generator will not reset, two good
batteries will give power for 27 minutes.
With only one good battery, power will only
be available for 12 minutes
(2) Requires maintaining VMC and landing as
soon as possible
NOTE: Reducing the electrical load on the
batteries will prevent premature loss of
emergency battery power.
(9-98) Original
Page 27-14
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