AIR INDUCTION SYSTEM
The engine air inlet is located at the lower forward section of the engine
nacelle. Ram air entering the inlet ows through ducting and an inertial
air particle separator system and then enters the engine through a circular
plenum chamber where it is directed by inlet guide vanes to the compressor
section. A screen is installed on the compressor air inlet which prevents
larger debris from entering the engine, but does not lter the inlet air.
Single Actuated Inertial Separator System (SIPS)
(This section applies to Serial Numbers 100-0001 through 100-0042, NOT
equipped with the KODIAK TKS Ice Protection System.)
An inertial air particle separator system (Inertial Separator) is installed in
the air inlet duct to prevent moisture and dust particles from entering the
engine when placed in BYPASS mode. The inertial separator consists of
two electrically actuated vanes and a xed airfoil which, during NORMAL
operation, route the inlet air through a gentle turn into the compressor air
inlet plenum. When operating in dusty or moisture lled environments, the
BYPASS mode may be selected. When the inertial separator is placed in the
BYPASS mode, the moveable vanes are placed in a position to force the air to
make a sharp turn prior to entering the inlet plenum. This sharp turn causes
any moisture or debris to separate from the inlet air and discharge overboard
through two louvered outlets on the lower portion of the engine nacelle.
Operation of the inertial separator system is controlled by a switch mounted
on the right switch panel in the ice protection cluster of switches. The switch
is labeled ENG INLET and has positions for NORMAL and BYPASS. The
inertial separator should be placed in BYPASS prior to operating the engine
when visible moisture is present (clouds, rain, snow, ice crystals, etc.) and
outside air temperatures are below 5°C. The inertial separator system
may also be used for ground operations or takeoffs from dusty, sandy eld
conditions to minimize the ingestion of foreign particles and debris into the
compressor. The NORMAL position should be used for all other operations.
An advisory annunciation is provided through the G1000 to indicate whether
the inertial separator system is in the NORMAL or BYPASS position as
follows:
ENG INLET NRM
ENG INLET BP
NOTE: When the BYPASS mode is selected, a slight reduction of engine
torque occurs.
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