FSD International
Commander 115 TC
Pilot Operating Handbook
- 51 –
Copyright© 2008 by FSD International. All rights reserved.
For use with Microsoft Flight Simulator only. Not to be used for real-world aviation.
6.11 ACCESSORIES
FUEL PUMP - A diaphragm type, self-regulated engine-driven pump is installed on the aft lower left
side of the engine accessory housing. This pump provides a continuous flow of fuel to the engine
without pressure variations. The pump design allows the auxiliary pump to move
fuel through it to the engine in the event it becomes inoperative and for the purpose of initial
engine priming and starting.
VACUUM PUMPS - Suction to operate the directional and attitude gyros is provided by two engine
driven vane type vacuum pumps. See VACUUM SYSTEM description later in this section.
ENGINE MOUNT
The engine mount is a welded tubular structure attached to the firewall at five (5) points. The
structure serves as an engine mount and nose gear mount. The mount has four (4) points that the
engine attaches to and uses two rubber shockmounts at each point. The bonded rubber and metal
shockmounts are designed to reduce the transmission of engine vibrations to the airframe.
AUXILIARY FUEL PUMP
The electric auxiliary fuel pump is located on the: right forward side of the firewall, and is
controlled by a two-position toggle circuit breaker switch labeled FUEL PUMP. The auxiliary fuel
pump is used as a boost pump in starting and in the event of engine-driven fuel pump failure. For
further Fuel System information refer to the Maintenance Manual.
FUEL MANAGEMENT
It is the pilot's responsibility to ascertain that there is sufficient fuel on board the airplane to safely
complete the planned flight. A visual check of each fuel tank should be made, and this should be
compared with quantity indicated on the fuel tank gauges. When fuel quantities are checked, the
airplane should be level to assure that any fuel quantity indication, either visual or electrical, will be
accurate. During cruise alternate fuel tanks, if necessary, to maintain lateral trim. When planning
flight, allow enough reserve fuel for safe completion of flight and to assure compliance with FAR 91
reserve requirements.
FUEL CONTAMINATION
To avoid fuel contamination always service the airplane from fuel facilities that utilize proper filter
systems to remove impurities and water accumulations from the bulk fuel. If filtering facilities are
not available, filter the fuel through a quality grade chamois. Fuel tanks should be serviced after
the last flight of each day to reduce condensation and allow any entrapped water accumulations to
settle to the fuel system drains prior to the next flight. Prior to the first flight of the day, and after
each refueling, the wing tank sumps, wheel well drains, and the gascolator should be drained to
assure proper fuel and lack of contamination. If contamination is present in the fuel sample,
continue to drain all sample points until fuel is clear.
FUEL TANK VENT SYSTEM
The fuel tanks are vented to atmosphere through vent scoops on the lower outboard wing surfaces
and under the center fuselage. These vents must be free of obstructions and should be checked
prior to the first flight of the day. Should a vent become obstructed it could result in fuel starvation
and possible engine stoppage.
