● When the aircraft is within the terminal area, 50.8 NM, and
the required accuracy cannot be guaranteed with the
available position
sensors.
● When the aircraft is within the approach area, 10 NM, and
the required accuracy cannot be guaranteed with the
available position sensors.
I
● Any time the FMS loses all sensors except the GPS. Present
use of GPS requires it to be compared with other approved
sensors. lf this cannot be done, the DGRAO annunciator is
turned on.
.
If the DEGRAD annunciator is on when the DR annunciator is
turned
on, the DEGRAD annunciator will be turned off.
9. B. (3) (d) Message (MSG) Annunciator
-
The MSG annunciator is an advisory
type (white) that lights when the FMS is displaying a message
in the scratchpad to the flightcrew.
The annunciator shall
extinguish after the message(s)
have been cleared from the
scratchpad.
(e) OFFSET Annunciator -
The OFFSET annunciator is an advisory type
(white) that lights when a laterally offset path has been
entered into the FMS using the
progress page. The annunciator
turns off when the offset has been
removed. If there is an
offset when the APRCH annunciator is lighted, the offset will
be removed and the annunciator turned off.
(f) Approach (APRCH) Annunciator - The APRCH annunciator is an
advisory type (white) that lights when in approach mode.
The
NZ-920 Nav Computer output sensitivity of lateral deviation to
the PFD will be ramped to a higher sensitivity when the
annunciator is lighted.
The APRCH annunciator will light under
the following conditions:
. If the destination elevation is specified, distance to
destination is less than 15 NM, altitude is less than 2500
feet above the destination elevation, and the speed is less
than 200 knots.
. If
the destination elevation is not specified, distance to
destination is less than 15 NM, and speed is less than 200
knots.
● If the APRCH annunciator is illum
flies out of the above conditions
will be extinguished and the sens
● When the pilot selects APP on the
controller.
nated and the aircraft
the APRCH annunciator
tivity ramped to normal.
flight guidance
22-14-00
Page 198:131
Apr 15/93
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