T-45C TS, ADV & IUT ENG-25
Display System and Malfunctions
a.
Straight and level flight required for about four
minutes
b.
Inflight alignment for other than GINA power
loss is initiated from aircraft data display
(1) Press RST
(2) ATTITUDE advisory flashes
(3) In 6-10 seconds pitch attitude, g and slip
indications displayed and advisory window
changes to POSITION
(4) Maintain airspeed below 250 KIAS until
GPS data valid
(5) After attitude displayed, 90-degree heading
changes one minute apart will reduce
alignment time
(6) When INS calculates the heading it is
displayed
c.
The alignment quality is improving as the QUAL
number decreases
d.
When alignment complete, HYBD, INS options
are displayed on the ADI display and all
information returns on the aircraft data display
e.
If the alignment quality is not improving, QUAL
number decreasing, the INS or GINA has failed
4.
GINA Velocity/Position Mis-compare
a.
GINA continuously comparing velocity and
position data from GPS and INS
b.
Indications
(1) AV BIT displayed on all MFDs
(2) ADI data effected
Original (9-98)
Page 25-15
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