FlightSafety Canada
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CL-600-2B16 PILOT TRAINING MANUAL
CL 601-3A/R
15-15
FOR TRAINING PURPOSES ONLY
STALL PROTECTION
SYSTEM
GENERAL
The dual-channel stall protection system pro-
vides warning of an approaching stall by a vi-
sual display on the system test indicators,
automatic engine ignition, stick shaking, aural
warning, flashing lights, and stick pushing.
Both channels are powered separately and op-
erate independently, displaying stall margin on
individual test indicators.
Inputs to the system computer are supplied by
two externally mounted angle-of-attack vanes,
two lateral accelerometers, two altitude trans-
ducers, flap position transmitters, and the
WOW system. From these inputs, the computer
establishes actuation points for stick shaking,
continuous ignition, aural warning, and stick
pushing. The WOW inputs prevent system op-
eration on the ground, except during testing.
Two transducers, receiving static pressure,
supply altitude information to the computer for
use in altitude compensation of stall margin.
The transducers are actually modified air data
computers, as indicated on the unit data plates.
Electrical power to the transducers is through
the respective stall channel circuit breakers.
The signal from one of the transducers is
routed through the pilot’s stall protection
test switch. Actuation of the switch inter-
rupts the altitude signal, causing a disagree-
ment that illuminates the ALT COMP FAIL
lights (Figure 15-15).
SPS TEST
INDICATOR
PROVIDES REFERENCE FOR ALL STALL
WARNING/STICK PUSHER SEQUENCE
BUT IS NOT CALIBRATED TO PROVIDE
AOA INDICATION OR APPROACH
SPEED REFERENCE
ADVISES CREW THAT ALTITUDE
COMPENSATION IS INOPERATIVE.
STALL PROTECTION IS STILL
WORKING BUT THE COMPUTER
REVERTS TO A 15,000-FOOT
REFERENCE
SPS FUNCTIONS:
• AUTO IGNITION
• AUTOPILOT DISCONNECT
• STICK SHAKERS
• AURAL WARNING
• STICK PUSHER
FLASHING—SYSTEM FAULT
STEADY—PUSHER IS
UNPOWERED OR
SELECTED OFF.
AP/SP DISC BUTTON
(BOTH CONTROL
WHEELS)
ADVISES CREW THAT PUSHER
SYSTEM HAS ACTIVATED
STALL PROTECTION
SYSTEM—STATIC
SOURCE ISOLATOR
STATIC
NORMAL
STALL
PROTECT
CLOSED
MASTER
CAUTION
PRESS TO
RESET
STALL
PUSH
ALT
COMP
FAIL
STALL
PROTECT
FAIL
MASTER
CAUTION
PRESS TO
RESET
STALL
PUSH
ALT
COMP
FAIL
STALL
PROTECT
FAIL
STALL PROTECTION
SYSTEM TEST
INDICATOR
WARN
LTS
STALL
PROTECTION
N/W
STEER
FLOOD
LTS
TEST
OFF
BRIGHT
DIM
TEST
PUSHER
OFF
OFF
ON
ARMED
OFF
STALL
PROTECTION
PUSHER
G SWITCH
WARN
LTS
FLOOD
LTS
TEST
TEST
OFF
BRIGHT
DIM
TEST
OFF
OFF
ON
AP
/S
P
D
ISC
NO
SE
D
N
N
O
S
E
UP
MIC
T/C STEER
Figure 15-15. Stall Protection System