Lancair ES-P, Pilot Operating Handbook

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Observe engine for visible damage or evidence of smoke or flame.
Extreme roughness may be indicative of propeller blade problem.
Mixture ADJUST as appropriate to power setting
being used. Do not arbitrarily go to Full
Rich as the roughness may be caused by
an over rich mixture
Magnetos ON
Low Boost
ON (if above 10000 feet)
High Boost OFF
If engine roughness does not disappear after the above, the following
steps should be taken to evaluate the ignition system.
Alternate Air OPEN
Throttle REDUCE power until roughness
becomes minimal
Magnetos OFF then ON, one at a time. If engine
smoothes out while running on single
ignition, adjust power as necessary and
continue. Do not operate the engine in
this manner any longer than absolutely
necessary. The airplane should be landed
as soon as practical for engine repairs.
CAUTION
The engine may quit completely when one
magneto is switched off, if the other magneto is
faulty. If this happens, close throttle to idle and
move mixture to idle cutoff before turning
magnetos on. This will prevent a severe backfire.
When magnetos have been turned back on,
advance mixture and throttle to previous setting.
WARNING
If roughness is severe or if the cause cannot be
determined, engine failure may be imminent. In
this case, it is recommended that the emergency
procedures be employed. In any event, further
damage maybe minimized by operating at a
reduced power setting.
TURBOCHARGER FAILURE
Turbocharger failure will be evidenced by inability of the engine to