BOMBARDIER CHALLENGER 604, Maintenance Manual

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REPLENISHING, OXYGEN SYSTEM - SERVICING
TASK 12−14−35−610−801
1. Quantity Check of the Oxygen System
A. Reference Information
REFERENCE DESIGNATION
TASK 12−00−07−861−801 Connect and Energize External AC Power
TASK 12−00−07−861−802 Remove External AC Power
TASK 12−14−35−614−801 Servicing of the Oxygen System
B. Job Set−Up
(1) Connect and energize the external ac power (TASK 12−00−07−861−801).
(2) Open the oxygen service door that follows:
ACCESS DESIGNATION
212BR Door, Oxygen Refill Connection
C. Procedure
Refer to Figure 301.
(1) At the oxygen refill connection door, examine the pressure gauge (1). Make note of
the value shown on the pressure gauge (1).
(2) Examine the overboard discharge indicator (2). Make sure that the green disc on
the indicator (2) is not broken. If the green disc is broken, there is too much
pressure in the crew oxygen system.
NOTE: Aircraft with two oxygen cylinders have two overboard discharge
indicators.
(3) In the flight compartment, do the steps that follow:
(a) Examine the oxygen quantity indication on the status page of the engine
indication and crew alerting system (EICAS).
(b) Compare the indication on the pressure gauge (1) with that of the EICAS
readout. Make sure that the values are less than 100 psi (689.50 kPa) of each
other.
CL−604 AIRCRAFT MAINTENANCE MANUAL − PART II
EFFECTIVITY: ALL
12−14−35
Page 301
Nov 28/2008