Cirrus Design Section 3
SR22T Emergency Procedures
P/N 13772-003 3-9
Possible Engine Failure Causes
Improper Fuel Management: If the engine failure cause is determined
to be improper fuel management, turn off Fuel Pump and resume fight.
Engine Driven Fuel Pump Failure: If fuel management is correct,
failure of the engine driven fuel pump or a clogged fuel filter is
probable. An engine driven fuel pump failure is probable when engine
will only operate with fuel pump on HIGH BOOST/PRIME. Reduce
power to 75% or less and land as soon as practical. Do not set the
mixture too rich for descent or landing.
Improper Mixture Setting: If fuel management is correct and the
engine driven fuel pump is functioning properly, it is possible the
mixture is either too lean or too rich.
Possible over rich conditions:
• Very low power settings at high altitude and rich mixture.
• Very low power settings with the fuel pump on and rich
mixture.
• Severe induction system blockage, leakage, or turbo failure
and rich mixture.
Possible over lean conditions:
• Advancing the throttle from a lean condition before
enriching the mixture
• HIGH BOOST/PRIME switched off from a lean condition
before enriching the mixture.
• Vapor in fuel line (likely to happen in very hot ambient
conditions at altitude).
• High altitude descent in lean condition with no
corresponding throttle or mixture change.
Above 18,000 Feet
The manifold pressure should be maintained at or above 15 in.Hg
(bottom of the green arc on the manifold pressure gage) when the
aircraft is operating above 18,000 feet. If the manifold pressure is
reduced below 15 in.Hg and the Power Lever positioned close to or at
idle, the engine may cease combustion
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