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Low fuel caution message (LOW FUEL)
As soon as the amount of usable fuel in the main tank is less than 3 US gal (+2/-1 US gal), this caution message is displayed.
The indication is calibrated for straight and level flight. The caution message may be triggered during turns which are flown with slip, or while taxiing in curves.
Doc. No. 6.01.05-E Revision 3 26-May-2003 Page 7 - 49
Pitot heating caution message (PITOT)
The Pitot heating caution message is displayed when the Pitot heating is switched off, or when there is a failure of the Pitot heating system.
Prolonged operation of the Pitot heating on the ground can also cause the Pitot heating caution message to be displayed. In this case it indicates the activation of the thermal switch, which prevents overheating of the Pitot heating system on the ground. This is a normal function of the system. After a cooling period, the heating systemwill be switched on again automatically.
Engine parameter caution message (ENGINE)
This caution message is displayed if a parameter shown on the engine instruments (AED 125 or CED 125) is outside of the green range.
The procedure to be followed is given in 4B.2 INSTRUMENT INDICATIONS OUTSIDE OF GREEN RANGE.
Status lights
Fuel transfer pump status light (FUEL TRANS)
This light will be illuminated as long as the electric fuel transfer pump is active.
Glow plugs status light (GLOW)
This status light will be illuminated as long as the glow plugs are active.
Doc. No. 6.01.05-E Revision 3 26-May-2003 Page 7 - 50
7.11 PITOT-STATIC SYSTEM
Total pressure is measured at the leading edge of a Pitot probe under the left wing. Static pressure is measured at two orifices at the lower and rear edges of the same probe. To protect against dirt and condensation there are filters in the system, which are accessible from the wing root. The Pitot probe is electrically heated.
With the alternate static valve, the static pressure in the cabin can be used as static pressure source in the event of a failure of the Pitot-static system.
7.12 STALL WARNING SYSTEM
If airspeed drops below approximately 1.1 times the stalling speed, the stall warning horn, located in the instrument panel, will sound. The horn becomes progressively louder the closer one gets to stalling speed. Suction at an orifice on the left wing leading edge activates the horn via a hose. The orifice for the stall warning in the left wing is marked by a red ring.
7.13 AVIONICS
The radio and navigation equipment is located in the central part of the instrument panel. A push-to-talk (PTT) button for the radio is mounted on the end of each control stick. There are connection facilities for up to 4 headsets between the front seats.
Doc. No. 6.01.05-E Revision 3 26-May-2003 Page 7 - 51
CHAPTER 8
AIRPLANE HANDLING, CARE AND MAINTENANCE
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