C
IRRUS
D
ESIGN
S
ECTION
3: E
MERGENCY
P
ROCEDURES
SR20
E
NGINE
S
YSTEM
E
MERGENCIES
P/N 11934-005
3-19
Engine System Emergencies
Engine Partial Power Loss
1. Air Conditioner (if installed) .................................................................OFF
2. Fuel Pump.................................................................................................. ON
3. Fuel Selector...................................................................... SWITCH TANKS
4. Mixture............CHECK APPROPRIATE FOR FLIGHT CONDITIONS
5. Power Lever ........................................................................................ SWEEP
6. Alternate Induction Air ........................................................................... ON
7. Ignition Switch ............................................................... BOTH, L, THEN R
8. Land as soon as practicable.
Procedure Complete
• WARNING •
If there is a strong smell of fuel in the cockpit, divert to the nearest suit-
able landing field. Fly a forced landing pattern and shut down the en-
gine fuel supply once a safe landing is assured.
• N
OTE
•
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.
A gradual loss of manifold pressure and eventual engine rough-
ness may result from the formation of intake ice. Opening the
alternate engine air will provide air for engine operation if the
normal source is blocked or the air filter is iced over.
(Continued on next page)
Reissue A