Section X
Safety Information
~ft
Twin Engine (Piston)
3. Don't fly without airborne radar into a cloud mass con-
taining scattered embedded thunderstorms. Embedded
thunderstorms usually can not be visually circumnavi-
gated.
4. Don't trust visual appearance to be a reliable indicator
of the turbulence inside a thunderstorm.
5. Do avoid by at least 20 miles any thunderstorm identi-
fied as severe or giving an intense radar echo. This is
especially true under the anvil of a large cumulonimbus.
6. Do circumnavigate the entire area if the area has 6/10
or greater thunderstorm coverage.
7. Do remember that vivid and frequent lightning indicates
the probability of a severe thunderstorm.
8. Do regard as extremely hazardous any thunderstorm
with tops 35,000 feet or higher, whether the top is visu-
ally sighted or determined by radar.
If you cannot avoid penetrating a thunderstorm, the follow-
ing are some do's BEFORE entering the storm:
9. Tighten your safety belt, put on your shoulder harness,
and secure all loose objects.
10. Plan and hold your course to take you through the
storm in minimum time.
11. To avoid the most critical icing, establish a penetration
altitude below the freezing level or above the level of
-15°C.
12. Verify that pitot heat is on and turn on carburetor heat
or engine anti-ice. Icing can be rapid at any altitude and
cause almost instantaneous power failure and/or loss of
airspeed indication.
10-38
May, 1994
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