VENT SYSTEM
Each tank is vented at two different points
through a series of vent lines which allow air
to enter or escape the tanks, depending upon
whether fuel is being used or added (Figure 5-
11). The vent lines extend from each wingtip
to common manifolds which form an inter-
connected inverted “U” in each fuselage wall
and then return to the wing area where they ter-
minate under the trailing edge on each side in
a flush-mounted NACA scoop. The scoop,
which has ice rejection capability, maintains
a slight positive tank pressure during flight due
to ram-air effect.
There are no valves or screens in the vent
lines, so dirt or ice accumulation does not nor-
mally occur. Any trapped fuel or moisture in
the vent lines is continuously purged from the
low points by a bleed line connected to each
scavenge ejector.
During pressure fueling, the fuel tank vent lines
are augmented with special vent valves which will
be described later under “Pressure Refueling.”
FlightSafety Canada
L t é e
L t d .
CL-600-2B16 PILOT TRAINING MANUAL
5-12
CL 601-3A
FOR TRAINING PURPOSES ONLY
AUXILIARY
TANK VENT
MAIN TANK
CLIMB VENT
MOTIVE
FLOW
PURGE
LINE
SCAVENGE FLOW
TO COLLECTOR TANK
MAIN TANK VENT
NACA SCOOP INLET
PURGE LINE
INVERTED U
VENT TUBE
SCAVENGE
EJECTOR
Figure 5-11. Vent System