T
RAINING
M
ANUAL
–
L
ANCAIR
IV/IVP
OIL TEMPERATURE, OIL PRESSURE, MANIFOLD PRESSURE
IRREGULARITIES
Increased oil temperature, decreased oil pressure, and a drop in manifold
pressure indicate a turbocharger malfunction or a partial or complete
turbocharger failure. The consequences of such a malfunction or failure are
twofold. The airplane would not be capable of sustaining altitude without the
additional power supplied by the turbocharging system. The loss in altitude in
itself would not create a significant problem, weather and terrain permitting, but
ATC must be notified of the descent. A more serious problem associated with a
failed turbocharger would be loss of cabin pressurization if the pressurization
system were dependent on the turbocharger compressor. Careful monitoring of
pressurization levels is essential during the descent to avoid the onset of hypoxia
from a slow decompression.
POTENTIAL PROBLEM WITH TURBOCHARGERS
Another potential problem associated with turbochargers is fuel vaporization.
Engine-driven pumps pulling fuel into the injector system are susceptible to vapor
lock at high altitudes. The Continental TSIO 550 requires that low fuel boost be
used to feed fuel to the engine driven pump under positive pressure above
12,000 feet. The pump should be turned on if fuel starvation occurs as a result of
vapor lock. If an intake pipe or turbo connector should come loose at high
altitude, the fuel mixture would become extremely RICH for the resultant ambient
air/pressure. Conditioned response of mixture “full rich” if the engine begins to
run rough must be retrained for high altitude flight.
COMBUSTIBILITY OF OXYGEN
Because of the highly combustible composition of oxygen, an immediate descent
to an altitude where oxygen in not required should be initiated if a fire breaks out
during a flight at high altitude. The procedures in the Airplane Flight Manual
should be closely adhered to.
THUNDERSTORM ACTIVITY OR SEVERE TURBULENCE
Flight through thunderstorm activity or known sever turbulence must be avoided,
at all costs. When flight through severe turbulence is anticipated and/or
unavoidable, the following procedures are highly recommended:
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©
Copyright
2007
LOBO
May
not
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copied
without
permission.