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TEO-540-A1A Engine Installation and Operation Manual
Engine Condition
Engine Operation (Cont.)
Engine indication not available
Engine in an environment at
temperatures less than 10°F
(-12°C) for more than 2 hours
Operation in climates above 100°F
(38°C)
Fuel consumption fluctuation
Fuel flow rate and lean of peak
operation
Ascent to target altitude, leveled
off - fuel flow increased with
power control input
Alternator or electrical system
fails in flight
Dead airframe battery on the
ground
Cannot operate low or high
manifold pressures at a specific
rpm
© 2018 Avco Corporation. All Rights Reserved
October 2018
Table 1 (Cont.)
Action for Engine Conditions
Explanation/Corrective Action
Complete a safe landing and speak to Maintenance.
Refer to the section "Apply Heat to a Cold Engine" in
this chapter.
Decrease climb angles to keep the engine cool. Refer to
the section "Engine Operation in Hot Weather" in this
chapter.
The EECS controls fuel flow to the engine based on the
actual airflow through the engine. The engine will
consume more air on a cold day than on a hot day for the
same rpm and manifold pressure. The EECS controls fuel
flow to maintain the desired fuel-to-air ratio.
The optimum fuel flow for a given combination of air
intake and engine speed conditions has been pre-
calculated. This optimal fuel flow will enable both
economy and safe reliable operation. There could be
some select points where "Lean of Peak" operation is
advantageous.
On hot days, during steep climbs, or in other situations in
which the engine could operate at high temperatures, the
EECS automatically prevents overheating. Higher fuel
flow can be observed as the EECS uses more fuel to
prevent detonation or exceeding the CHT or TIT limits.
The engine will continue to operate even if the alternator
or electrical system fails. The engine has a dedicated
electrical generator that is separate from airframe power
to ensure the engine continues to operate if external
power is not available. This power source will supply
power to the dedicated warning annunciators. In flight,
the engine can restart even without airframe power as
long as the engine is wind milling at least 1000 rpm.
Use a battery charger or jumper cart to start the engine.
The EECS automatically uses a manifold pressure and
rpm combination depending on the throttle position. This
setting was calculated by the airframe manufacturer and
Lycoming for the most consistent operating points for
take-off, climb, and cruise.
Engine Conditions
Page 71
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