(11) Both main landing gear weight on wheels (WOW) switches in the
ground position OR both main landing gear wheel speeds (sensed
by the anti-skid sensors) greater than forty-seven knots (>47 kts)
OR one main landing gear WOW switch in the ground position and
the other main landing gear wheel speed greater than forty-seven
knots (>47 kts).
NOTE:
The GPWS / GND SPLR FLAP ORIDE pushbutton
selection furnishes an alternate relay path bypassing
the flaps greater than twenty-two degrees (>22°)
requirement and also prevents nuisance
annunciations from the GPWS module of the MAUs
due to ground proximity without the normal landing
flap configuration.
To enable automatic deployment of ground spoilers for reducing stopping
distance in event of an aborted takeoff, the following conditions must be
met for normal takeoffs.
(12) The SPOILER CONTROL pushbutton selected ON.
(13) Wing flaps selected to takeoff setting - ten or twenty degrees (10° or
20°).
(14) Power levers advanced greater than idle.
(15) GND SPLR pushbutton selected to ARMED.
(16) WOW switches in the ground mode (compressed).
(17) Power levers subsequently retarded to idle.
NOTE:
It is not necessary for wheel speed to increase over
forty-seven knots (47 kts) for the ground spoilers to
deploy during an aborted takeoff.
C. Malfunction Monitoring - Landing and Takeoff:
When the automatic ground spoilers are armed for landing or for aborted
takeoff protection, the system is monitored by the MWS for correct
performance. The MWS verifies all of the control logic parameters, senses
uncommanded pressurization of the ground spoiler control servos, and
circuit integrity to the servos and power lever position switches. If all of the
control logic parameters for the specific aircraft configuration as previously
described have been satisfied, but either or both of the ground spoilers do
not deploy, both red NO GND SPLRS lights located on either side of the
forward windshield center post, will illuminate, a red CAS warning message
of “Ground Spoiler” is displayed accompanied by illumination of the Master
Warning lights on the cockpit glareshield and annunciation of the warning
chime signal over the cockpit speakers. (Ground spoiler operation is
sensed by the stow position contact switches on the inboard spoiler panels
on each wing - the inboard ground spoilers are position monitored since the
mechanical linkage from the inboard actuators operates the actuators for
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS2A-27-00
Page 74
August 14/03
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