Cessna 402C - Page 99

(AMPLIFIED PROCEDURES)
SECTION 4
NORMAL PROCEDURES
During letdown, watch engine temperatures closely and carry sufficient
power to maintain them above operating minimums.
The pitot heat and stall ,warning heater switches should be turned ON at
least 5 minutes before entering potential icing conditions (2 minutes if on
ground) so that these units will be warm enough to prevent formation of
ice. Preventing ice is preferable to attempting its removal once it has
formed.
ALTERNATE INDUCTION AIR
The induction system employed on these engines is considered to be
nonicing. However, a manually operated alternate induction air system is
incorporated to assure satisfactory operation. Should the induction air
inlet, or the induction system air filter become obstructed, the alternate
air doors should be manually opened by turning and pulling the alternate
air controls full open. which will admit warm unfiltered air to the
engines. This system
will provide continued satisfactory engine operation.
Gradual
loss of manifold pressure can be an indication of filter icing.
Should additional power be required, the following procedures may be
employed:
1. Increase
RPM as required.
2.
Move throttles forward to maintain desired manifold pressure.
3. Readjust mixture
controls for smooth engine operation.
During ground operation, the alternate air doors should be closed to
prevent engine
damage caused by ingesting debris through unfiltered air
ducts.
NOISE ABATEMENT
Increased emphasis on improving the quality of our environment requires
renewed effort on the part of all pilots to minimize the effect of airplane
noise on the public.
We, as pilots, can demonstrate our concern for environmental improvement
by application of the following suggested procedures. and thereby tend to
build public support for aviation:
1. Pilots operating airplanes under VFR over outdoor assemblies of
persons,
recreational and park areas, and other noise-sensitive
areas should make every effort to fly not less than 2000 feet above
the
surface, weather permitting, even though flight at a lower
level
may be consistent with the provisions of gov~rnment
regulations.
1 November 1979
4-29