FSD International
Commander 115 TC
Pilot Operating Handbook
- 57 –
Copyright© 2008 by FSD International. All rights reserved.
For use with Microsoft Flight Simulator only. Not to be used for real-world aviation.
6.16 STATIC PRESSURE SYSTEMS
SHIP'S STATIC
Static ports are located on both sides of the aft fuselage at station 205.00. Tube routing from the
static pressure ports is up to a tee at the airplane centerline, then forward, under the upper cabin
upholstery, to the windshield area. The line is then routed to the alternate static valve (which
doubles as a drain), then to the instrument panel where it is coupled to the altimeter, airspeed and
vertical speed indicators.
ALTERNATE STATIC
A toggle-type alternate static source valve is installed at the far lower left of the instrument panel.
In the event the static ports become obstructed, causing erroneous static pressure instrument
readings, the alternate static source valve should be placed in the ON position to provide an
alternate source of static pressure. When the alternate source valve is in the ON position, the
normal static ports are isolated and static pressure for the airspeed indicator, altimeter and vertical
speed indicator is supplied from inside the cabin. It is recommended that side windows be closed
when operating on alternate static source.
VACUUM SYSTEM
Suction to operate the directional and attitude gyros is provided by two engine driven vane type
vacuum pumps. The pumps, installed on the engine accessory housing, are gear driven through
couplings. A vacuum regulator is used to control system pressure. A vacuum gauge, located below
the engine instrument sub-panel, indicates the system pressure level. Two failure indicators,
located directly below the vacuum gauge, give the pilot prompt notification of the failure of either
vacuum pump.