CIRRUS DESIGN SR20, Pilot Operating Handbook

Page: 61 / 508

P/N 11934-003 3-13
Cirrus Design Section 3
SR20 Emergency Procedures
Engine Partial Power Loss
Indications of a partial power loss include fluctuating RPM, reduced or
fluctuating manifold pressure, low oil pressure, high oil temperature,
and a rough-sounding or rough-running engine. Mild engine
roughness in flight may be caused by one or more spark plugs
becoming fouled. A sudden engine roughness or misfiring is usually
evidence of a magneto malfunction.
• Note •
Low oil pressure may be indicative of an imminent engine
failure –
Refer to Low Oil Pressure procedure in this section
for special procedures with low oil pressure.
• Note •
A damaged (out-of-balance) propeller may cause extremely
rough operation. If an out-of-balance propeller is suspected,
immediately shut down engine and perform Forced Landing
checklist.
If a partial engine failure permits level flight, land at a suitable airfield
as soon as conditions permit. If conditions do not permit safe level
flight, use partial power as necessary to set up a forced landing
pattern over a suitable landing field. Always, be prepared for a
complete engine failure.
If the power loss is due to a fuel leak in the injector system, fuel
sprayed over the engine may be cooled by the slipstream airflow
which may prevent a fire at altitude. However, as the Power Lever is
reduced during descent and approach to landing the cooling air may
not be sufficient to prevent an engine fire.
• WARNING •
If there is a strong smell of fuel in the cockpit, divert to the
nearest suitable landing field. Fly a forced landing pattern and
shut down the engine fuel supply once a safe landing is
assured.
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Revision A5