PD9B01M0 1ST ISSUE 1/07/2019 24
Each fuel tank is equipped with individual float-sensor that measures the fuel level and is
connected with its gauge located on the panel. A pressure indicator on the instrument panel is also
connected to the fuel line. Each main fuel tank has a dedicated vent that is located just underneath
the wing lower skin while the auxiliary fuel tank has a dedicated vent that is connected to the
fuselage front floor.
Fuel drains are located just underneath the main fuel tanks and are accessible from the lower wing
leading edge. Draining can simply be done when necessary by using standard Aircraft Fuel
Testers.
See ANNEX A (Fuel System group). for details on the basic propeller maintenance. For all other
information about this component, please refer to the engine manufacturer.
6 Propeller
The Pioneer 300 aircrafts may be equipped with different propeller types (see Table 4).
See ANNEX A (Engine Group) for details on the basic propeller maintenance. For all other
information about this component, please refer to the propeller manufacturer.
7 Utility systems
7.1 Cabin heat and cooling
Cabin ventilation is achieved by conveying ram air through a NACA air intake located on the lower
left side of the engine cowling (pilot's view). This air intake also ducts the ram air through the
system to the heat exchanger to provide heat to the cockpit if required.
Both the fresh air and the heated air can be opened, closed and adjusted by the pilot by using the
controls/devices described in the POH.
See ANNEX A (Cockpit and Interiors group) for details about maintenance and repair actions.
8 Instruments and avionics
The instrument panel adopted for a generic Pioneer 300 aircraft changes on the basis of the
chosen engine type and the preferences of the aircraft holder. The maintenance actions about this
instrument are well described into ANNEX A (Electrical and Avionics group).
Individual instruments may be accessed for removal by releasing a screw and sliding instrument
panel. Before removing individual instruments, use particular care in disconnecting wires, hoses or
other links as the case applies.
When installing instruments, also follow these general recommendations:
✓
Do not over-tighten bolts as plastic instrument casing may break;
✓
Ensure hoses are free of any foreign matter and that no tight radius turns are present as this
may choke hose or cause malfunction;
✓
Insure proper grounding and tightening of all electrical instruments.
8.1 Instruments that require sensors
The instruments that requires specific sensors/gauges to operate are:
1) Oil temperature indicator;
