ULPOWER UL390iSA Specifiche Scaricare il pdf (Pagina 23)

Operating Manual ULPOWER UL390i UL390iS UL390iSA

MO 390A01 Revision No: 2 Date: 2014-09-15 Page: 21 of 22

On the ground, check fuel or electrical system for possible cause. Replace filter(s), pump(s), lines,

pressure regulator or sensor as necessary.

Test the fuel system with ignition off and master switch and fuel pump on.

Single CHT and/or EGT drop

Verify that both CHT and EGT of the same cylinder have dropped. If not, CHT or EGT probe or signal

intake have a malfunction. Correct before next flight.

 WARNING: A large deviation of both CHT and EGT temperatures in one cylinder, when

compared to the others, indicates that the particular cylinder is not firing properly

or is not firing at all. Engine delivers reduced power. Carry out

emergency/precautionary landing.

If it is not a sensor malfunction, send the engine to a ULPower authorised service-centre for

inspection/overhaul.

Knocking

Reduce engine power setting to the minimum necessary and keep engine temperatures well below

the maximum.

 WARNING: Carry out emergency/precautionary landing.

Be sure the right fuel type and octane rating have been used.

Low battery voltage

Switch off all unnecessary electrical consumers, as engine needs battery to operate.

 WARNING: Carry out emergency/precautionary landing.

To reduce electrical power consumption in flight even more, one ignition system can be turned off.

Keep in mind that ignition backup system is not operating at that time, but in the event of an

emergency, can be manually selected by switching second ignition system back on and switching

first off.

On the ground, have generator, battery and electrical systems checked for any malfunction. Verify

that no more than 15 Amps are being used by electrical devices other than the engine and fuel

pump.

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ULPOWER UL390iSA Specifiche Pagina 23