Maintenance Manual STEMME S10
Date of Issue Oct. 01, 1990
page: 18
Amendment No.: 11
Date: May 25. 2005
A4010021_B19.doc-18/27.01.14 14:18/27.01.14 14:18
Doc.No.: A40-10-021
3.4.2 Tail Wheel
Tail wheel steerable with the rudder pedals and connected to the rudder by springs.
3.5 Flight Instruments, Pressure System
(figure 3.5.a)
Instruments: see Equipment List.
The pitot pressure, the static pressure and the total energy compensation are measured by means of a bar
probe in the propeller dome. The ducts are directed to the instrument panel. The static pressure measured by
the bar probe may not be used for the airspeed indicator!
In addition, static pressure is measured primarily for the airspeed indicating system on both sides of the tail
boom. This duct is also directed to the instrument panel. All ducts are equipped with water traps/filters.
3.6 Electric System
(figures 3.6.a to 3.6.e)
The electric system is supplied by a main battery and a generator. The main battery is installed behind the
firewall.
All current circuits and electric instruments are protected by fuses or circuit breakers, respectively.
Master Switch:
cuts all current sources from the main bus. In case of failure of the main current
circuit, the avionics instruments are automatically switched over to the auxiliary
battery (if installed).
Subordinate Switches:
Engine master switch
to switch "ON" / "OFF" all electric appliances of the power-plant (starter,
instruments, etc.) connected to the main battery and the generator. Recommended
switch position for soaring flight: "OFF", since otherwise current consumed.
Starter:
push button for electric engine starter.
Ignition:
to switch Ignition "ON" / "OFF".
Avionics:
to switch "ON" / "OFF" all flight and navigation instruments electrically energised.
During operation of the starter, the avionics instruments are switched off or
switched over to the auxiliary battery (if installed).
Landing gear switch:
– Upper position:
RETRACT
−
Lower position:
LOWER
−
Centre position:
Circuit disconnected from electrical system.
ACL (optional):
ON / OFF - only operative with engine master switch ON (Anti-Collision Light).
Position lights (optional): ON / OFF - only operative with engine master switch ON.
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