01-10-30 Exhaust System Description
General:
The exhaust system is necessary to release the exhaust fumes in a safe and proper way into the
environment. Wrong installation and maintenance can lead to vibrations, which can cause serious
damage in the exhaust system.
Excessive tension at exhaust system mounting points could cause cracks and be a
potential fire hazard.
Components of the A/C System:
(For installation and maintenance details refer to the applicable Aircraft Maintenance
Manual)
ï‚· Exhaust pipe (including optionally exhaust muffler)
Example for acceptable Exhaust System is given under 01-10-10
(For particular installation refer to the applicable Aircraft Maintenance Manual)
01-10-40 Coolant System Description
General:
The internal engine cooling circuit consists of coolant pump, which is driven by the belt, the integrated
coolant/oil heat exchanger, coolant ducts within crank case, cylinder head and intake manifold, where
the coolant temperature sensors are located, and the coolant thermostat.
Coolant enters the engine, driven by the coolant pump. Depending on coolant temperature the
coolant passes at the coolant thermostat through the short circuit direct back to the engine, or
through the radiator, where it is cooled before returning to the engine by passing the oil/coolant heat
exchanger.
At the thermostat there are two circuits connected, the small circuit, which is flown through as long as
the engine is cold and the radiator circuit, which starts to be opened as soon as a coolant temperature
measured direct at the thermostat is above 80 °C (176 °F).
Above 95 °C (203 °F) coolant temperature the radiator circuit is fully open and the small circuit totally
closed. The Heating circuit is always open and aids in cooling.
An expansion tank is provided which contains a silica reservoir to provide the necessary corrosion
protection. The expansion tank has an overpressure valve installed which limits the relative pressure
in the coolant system to max. 2,3 bar (33,36 psi). In addition a low pressure valve is installed to
protect the coolant system from negative pressure
The coolant reservoir allows the coolant to expand when cold, or allows the cooling system to draw
additional coolant as needed. The coolant reservoir also contains a low coolant level indicator
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