BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual page 239

NOTE
The APR system is used only for
takeoff and is then disarmed. The
APR fail light is inhibited in flight
through WOW logic and for landing
by flap 45° selection.
A green TEST light forms the lower portion
of the READY light. During testing, this light
will illuminate as the last indication in a se-
ries until the APR switch is released from the
TEST/RESET position.
Testing
Two tests are associated with the APR sys-
tem: (1) static test and (2) dynamic test.
Static Test
Holding the APR switch in the TEST/RESET
p o s i t i o n c a u s e s t h e f o l l ow i n g f u n c t i o n s
and indications:
1. The system is reset, the APR program
is restarted, and all previous perfor-
mance data in the memory is cleared.
2. Validates the battery direct bus voltage
input. If not present, the amber APR
light will illuminate.
3. Tests all lamps for 1 second each in
the following sequence:
a. Ready and L. ON
b. Ready and R. ON
c. Test
d. APR
e. Test (will remain on as long as TEST
is held)
4. If any faults are detected, the amber
APR light will illuminate.
7-22 CL 601-3R
CL-600-2B16 PILOT TRAINING MANUAL
Dynamic Test
The dynamic test is done just prior to flight.
It is automatically performed for both engines
by the APR controller and verifies that the
APR system is operational. To perform the
test, the APR switch is armed. Advance both
thrust levers to obtain an indicated N
83% (note the READY light came on at 79%
N
continuously to determine if they are stable;
that is, fan rpm does not vary more than a pre-
determined amount. The dynamic test initiates
an APR trigger to both APR amplifiers which
causes both engines to accelerate slightly. If
the test is valid, the TEST light will momen-
tarily flash. If outside the permissible limit,
the amber APR light will illuminate, accom-
panied by the MASTER CAUTION light.
Operation
Before takeoff, the static and dynamic tests are
performed and determined as valid, both en-
gine speed control switches are on, and the
APR switch is at ARM. The green READY
light will illuminate after 79% N
APR light and the green L. ON and R. ON
lights and the TEST light are extinguished.
Figure 7-21 illustrates an APR trigger. Both
fuel control amplifiers (FCUs) are receiving N
N
2
engine N1 has decreased below N
trol (79% N
ger" speed (approximately 68% N
controller sends a signal to both amplifiers to
increase N
is still on N
illuminates the green L. ON legend when it has
increased the required amount (approximately
2% N
since it is not on N
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
). The APR controller samples the fan rpm
1
, T , and power lever angle (PLA). The right
2
) and has reached the APR "trig-
1
. The left engine responds since it
1
speed control (above 79% N
1
). The right engine does not respond
1
speed control.
1
L té e
L td .
above
1
. The amber
1
,
1
speed con-
1
). The APR
1
) and
1