(2)
Make sure that the BATTERY MASTER switch in the flight compartment is set to
OFF.
(3)
Open, safety and tag the circuit breakers that follow:
LOCATION CB NUMBER CB NAME ZONE
CBP−2
M3
BATT BUS POWER SENSE
222
CBP−2
M4
RCCB CONT MAIN BATT
222
CBP−2
M5
RCCB CONT APU BATT
222
CBP−2
M7
FEED 1 BATT BUS
222
CBP−2
M9
FEED 2 BATT BUS
222
(4)
Obey all the oxygen safety precautions (TASK 35−00−00−910−801).
(5)
Open the oxygen refill connection door (212BR).
E.
Procedure
WARNING:
DO NOT LET OIL, GREASE OR SOLVENTS GET ON YOUR HANDS,
CLOTHING OR THE EQUIPMENT USED TO DO WORK ON THE
OXYGEN SYSTEM. IF OXYGEN TOUCHES GREASE, OIL OR
SOLVENTS, THEY CAN START TO BURN.
(1)
Do the servicing of the oxygen system as follows:
(a)
Use an oxygen mask and set the regulator valve to N.
(b)
Remove the dust cap (3) from the oxygen filler valve (4).
(c)
Connect the filler line of the oxygen cart to the oxygen filler valve (4).
(d)
Examine the pressure gauge (2). If the pressure indication is less than 50 PSI,
replace the crew oxygen cylinder (TASK 35−11−01−000−801 and TASK
35−11−01−400−801).
NOTE:
Before you send the oxygen cylinder to be purged, open the valve
slightly and listen for a hiss. Use a piece of paper to determine that
there is a positive pressure in the cylinder. If you find a positive
pressure, the oxygen cylinder can be replenished, re−installed and
the oxygen system purged.
CL−604 AIRCRAFT MAINTENANCE MANUAL − PART II
EFFECTIVITY: ALL
12−14−35
Page 305
May 29/2009
Summary of Contents for CHALLENGER 604
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