(See Figure 14.)
The purpose of the GND SPLR TEST switch is to operationally test
the warning circuitry of the ground spoiler system. When depressed
and held, the following actions occur:
• The NO GND SPLRS lights are illuminated
• The MASTER WARN lights are illuminated and a three-chime
aural warning tone sounds
• A red GND SPOILER warning message is displayed on CAS
• The IN TEST legend on the GND SPLR TEST switch is
illuminated blue
NOTE:
The ground spoilers do not deploy during this test.
(5) GPWS/GND SPLR FLAP ORIDE Switch:
(See Figure 13.)
The purpose of the GPWS/GND SPLR FLAP ORIDE switch is to
override the necessity of flaps being extended greater than 22° to
enable automatic ground spoiler deployment at wheel spin-up. All
other parameters must still be satisfied. In addition, selection to ON
inhibits the GPWS voice alarm “TOO LOW, FLAPS”.
C. Speed Brake Control System:
(See Figure 13.)
The Speed Brake Control system provides a method for manual selection
of deployment of all six spoiler panels in flight to slow the aircraft airspeed
and increase the descent rate.
The speed brakes are manually controlled and hydraulically powered. With
hydraulic pressure available, the speed brake control system deploys all
spoiler panels to 30 (±1 degree for inboard panel, ±4 degrees for two
outboard panels) degrees when the SPEED BRAKE handle in the center
pedestal is placed in EXTEND detent. With speed brakes extended,
rotation of the control wheel in either direction will further extend the
outboard two (inboard and outboard flight spoiler) panels on the side of the
raised aileron, up to a maximum of 55 (±4) degrees. These panels will
return to their original extended position when the control wheel is returned
to neutral.
NOTE:
The two outboard (inboard and outboard flight spoiler)
panels on each wing may deploy 2 to 3 degrees less
than the inboard (ground spoiler) panel when the
speed brakes are extended. This is due to flight spoiler
breakout delay, and is normal.
If the SPOILER CONTROL switch is selected to OFF, hydraulic pressure is
inhibited and the speed brakes will be inoperative.
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS2A-27-00
Page 38
May 22/01
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