Pilot's Operating Handbook
Section 7
Description
Edition 0 - October 31, 2013
Rev. 4
Page 7.12.1
7.12 - Vacuum system and instruments - see figure 7.12.1
The
airplaneis fitted witha vacuumsystem providingthe suctionnecessarytooperate
the cabin pressurization and the leading edge deicing.
Vacuum system includes :
- A pressure regulator
- An ejector
- A regulating and relief valve
- A pressure switch
Compressed air necessary for the ejector to create decompressed air is taken from
the powerplant. The air flow is regulated before going into the ejector which creates
necessary vacuum by venturi effect.
A relief valve fixed in cabin to frame C2, maintains the vacuum for pressurization
system. In case of pressure drop, a pressure switch, installed in the system, indicates
the failure by causing
VACUUM LOW to light on.
Electronic standby indicator (ESI-2000)
The L-3 communications avionics systems ESI-2000 electronic standby instrument
system consists of an AMLCD display. An air data sensor is integral to the ESI-2000
housing. A replaceable battery assembly provides back up power. The electronic
standby indicator displays attitude (pitch and roll), along with altitude and airspeed.
The ESI-2000 is powered from the ESS BUS 2, or internal battery ensuring that the
airplane can continue safe flight and landing in the event of a loss of primary attitude
and airdata displays.Pitotand static pressuresareprovidedto theESI-2000 usingthe
airplane pitot probe and static sources.
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