T
RAINING
M
ANUAL
–
L
ANCAIR
IV/IVP
Reduce electrical load to the minimum required to continue safe flight. If
necessary, turn off the battery to conserve power to ensure normal landing gear
and flap extension are available for landing.
ENGINE ROUGHNESS
Observe engine for visible damage or evident of smoke or flame. Extreme
roughness may be indicative of propeller blade problems. If any of these
characteristics are noted, follow these procedures:
1.
Mixture Control – ADJUST as appropriate to power setting being used.
Do not arbitrarily go to full rich as the roughness may be caused by an
overrich mixture.
2.
Magnetos – CHECK ON
If engine roughness does not disappear after the above, the following
steps should be taken to evaluate the ignition system:
a.
Throttle – REDUCE power until roughness becomes minimal
b.
Magnetos – OFF, then ON, one at a time. If engine
smoothes out while running on a 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.
If no improvement in engine operation is noted while operating on either
magneto alone, return all magneto switches to ON OR BOTH as
appropriate.
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.
FAILURE OF THE ENGINE-DRIVEN FUEL PUMP
(Characterized by an abnormally low fuel flow)
(This procedure should be memorized and immediately used if the engine
fails AFTER takeoff)
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76
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©
Copyright
2007
LOBO
May
not
be
copied
without
permission.