OPERATING
CONDITIONS
NORMAL CONDITIONS
All six hydraulic pumps should be in opera-
tion during takeoff and landing. After takeoff,
when a safe altitude has been attained and the
flaps are retracted, the B pumps are switched
off. Under these conditions, the ELECT PUMP
lights will not illuminate. Prior to landing,
the B pumps should be switched ON to pro-
vide backup pressure. If the pumps are not
switched on at this time, the ELECT PUMP
lights will come on when the flaps are ex-
tended, as an indication that the pump switches
must be on for landing.
ABNORMAL CONDITIONS
If a generator fails or is selected off in flight,
power is removed from the opposite side elec-
trical pump. For example, if the left genera-
tor is inoperative, the electrical pump in the
No. 2 hydraulic system will be unusable. This
electrical load shedding continues as long as
the generator is not operating and the airplane
is in flight.
The No. 3 hydraulic system electrical pumps
are not loadshed (3A and 3B) by failure of an
engine or generator.
EMERGENCY CONDITIONS
If a complete electrical power failure occurs on
both AC bus 1 and AC bus 2, and the auxiliary
power unit (APU) is not operating, the ADG will
automatically deploy and provide power for
operation of the 3B pump in the No. 3 hydraulic
system. The pump provides sufficient pressure
for operation of the landing gear, inboard wheel
brakes, and primary flight controls.
NOTE
A listing of pump availability ac-
cording to airplane configuration is
shown in Table 13-1.
FlightSafety Canada
L t é e
L t d .
CL-600-2B16 PILOT TRAINING MANUAL
CL 601-3A/R
13-7
FOR TRAINING PURPOSES ONLY
PUMP
AIRPLANE
CONFIGURATION
LEFT ENGINE
1B
3A
3B
2B
RIGHT ENGINE-
DRIVEN
DRIVEN
* WOW, external AC or APU
✓
✓
✓
✓
WOW, left engine and generator
operating
✓
✓
✓
✓
✓
WOW, right engine and generator
operating
✓
✓
✓
✓
✓
WOW, both engines and generators
operating
✓
✓
✓
✓
✓
✓
** W off W, both engines and
generators operating
✓
✓
✓
✓
✓
✓
W off W, both engines and left
generator operating
✓
✓
✓
✓
✓
W off W, both engines and right
generator operating
✓
✓
✓
✓
✓
W off W, left engine and generator
operating
✓
✓
✓
✓
W off W, right engine and generator
operating
✓
✓
✓
✓
W off W, APU generator operating,
no engine generators operating
✓
✓
✓
✓
W off W, no generators operating
✓
†
✓
✓
* WOW = Weight on wheels
** W off W = Weight off wheels
† Operates regardless of pump switch position
Table 13-1. PUMP AVAILABILITY