The Light Weight Engine Houtekietstraat 11
B-8540 Deerlijk, Belgium
EFFECTIVITY
page 24
ALL
19-3-2019
example one ignition circuit). Redundant systems are only there to flight continuation until an
airfield may be reached, and a safe landing secured so the failure may be fixed.
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Unusual noises
If any unusual noises come from the engine bay then there could be an exhaust or air intake
problem. In the case of a defective exhaust system this could mean that the exhaust gases are not
exiting outside the cowling and may even penetrate into the cabin. Alternatively some hot gases
impinge on other parts and create further damage. This is a seious potential problem for both
aircraft and crew and a landing of the next airfield is to be initiated immediately. Once landing has
occurred the problem must be identified and fixed.
Unusual noises coming from the intake system points to problems coming from a defective or
loose air filter and intake duct system. This has potential for damaging the engine, the possibility
of induction of foreign particles into the engines combustion chamber, which will damage the
engine seriously. This is a serious potential problem for both aircraft and crew and a landing of the
next airfield is to be initiated immediately. Once landing has occurred the problem must be
identified and fixed.
•
Heavy vibrations
The LF26 has a Multipoint fuel injection system so carburettor icing cannot occur, and will not be
the cause of vibrations. This means any heavy vibrations must come from other sources, like the
propeller, loss of counterweights on the propeller, loose bolt holding the propeller, loose spinner,
etc.
Heavy vibrations can also be a sign of beginning engine failure or indicate the loss of one cylinder,
for example due to an injection failure or a damaged ignition.
In any case set a power setting with lowest vibration, but which still allows a safe flight and land
on the next airfield.
ECU ERROR MESSAGES
Possible error messages coming from internal diagnosis of the ECU:
Two leds are incorporated in the ECU case.
When the two LEDs are NOT lit = Everything is OK, No Errors.
Errors are logged and can be displayed when downloaded from the ECU (See ECU D-Motor manual)
Indicated errors from the diagnose means that or the sensor is damaged, or that the parameter is
outside the expected range. For example, if the temperature is too high.
