BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual page 502

Overboard Discharge Indicator
The green overboard discharge indicator
(Figure 17-7) is located on the right side of the
exterior nose section. When missing, it pro-
vides a visual indication that an overpressure
condition existed in the oxygen cylinder and
that the pressure has been vented overboard.
An overpressure condition occurs when cylin-
der pressure reaches approximately 2,800 psi.
(This is approximately 900 psi above the fully
serviced pressure of 1,850 psi.)
LIMITATIONS
The Challenger crew oxygen system has the
following limitation:
• Crew oxygen supply must be serviced,
and quick-donning masks must be on
board and serviceable prior to each flight.
ALTITUDE—FEET X 1,000
Figure 17-8. Average Time of Useful Consciousness
36
32
28
TIME TO UNCONSCIOUSNESS
24
20
0 4
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
CL-600-2B16 PILOT TRAINING MANUAL
Figure 17-7. Overboard Discharge
Figure 17-8 depicts the average time of use-
ful consciousness (time from onset of hypoxia
until loss of effective performance) at various
cabin altitudes.
TIME OF USEFUL
CONSCIOUSNESS
8 12
TIME—MINUTES
Indicator
16 20
CL 601-3A/R 17-5
L t é e
L t d.