Electro-Pneumatic Flow Control 803662 Series

DESCRIPTION AND OPERATION

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1. General
A. This manual provides component maintenance instructions with illustrated parts list for Electro-Pneumatic Flow Control Units, part numbers 803662-01 , -02, -04, -05, and -13, and 803663-01, and -04 (Figure 1).

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2. Purpose of Equipment
A. The Electro-Pneumatic and Electro-Pneumatic Flow Control Units form part of the aircraft passenger emergency oxygen system when installed in a pressurized cabin. When the cabin pressure drops below a pressure equivalent to the pressure listed in Table 1 the Flow Control Unit(s) automatically initiates and controls the flow of oxygen from a high pressure gaseous oxygen source to the passenger mask compartments. The system may also be activated at any altitude manually at the Electro-Pneumatic Flow Control Unit, or electrically through the Electro-Pneumatic Flow Control units.

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3. Typical lnstallation
A) A typical pressurized cabin installation is shown in Figure 2. An oxygen source consisting of a series of high pressure oxygen storage cylinders is connected through pressure reducers to the inlets of flowcontrol units.

B) The control units are normally closed (OFF). ln the event of cabin decompression (cabin pressure drops below pressure listed in Table 1), the aneroids within control units are preset to automatically actuate and control the flow of oxygen to the passenger emergency oxygen system.

lf required, the system may be actuated electrically by a crew member from the cockpit of the aircraft through control unlt 803662 and/or 803663, to supply oxygen to the passenger oxygen system. Switches control electrical actuation of control units 803662 and 803663.

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EFFECTIVITY:ALL
The data and information contained herein are proprietary to AVOX Systems lnc.
Copying and Distribution to a thrid party are strictly forbidden.