BEFORE TAKEOFF CHECK

The actual prior to takeoff check can be the systematic procedure
for making a check of the particular engine, controls, systems,
instruments, and also avionics prior with flight. Normally, it is
performed after taxiing to a position near the takeoff
end of the actual runway. Taxiing to be able to that position commonly
allows sufficient time for the actual engine in order to warm about at
least minimum operating temperatures. This ensures
adequate lubrication and internal engine clearances
before being operated at significant power settings. Various
engines require which the actual oil temperature reach a
minimum value as reported within the AFM/POH prior to significant
power is applied.
Air-cooled engines mostly tend to be closely cowled not to mention
equipped with pressure baffles which direct the particular flow of
air with the actual engine inside sufficient quantities for cooling with regard to
flight. On the ground, nonetheless, a lot less air can be forced
through the actual cowling and even about the particular baffling.
Prolonged ground operations will cause cylinder
overheating long before right now there can be an indication of rising
oil temperature. Cowl flaps, when accessible, should be set
according to the particular AFM/POH.
Before beginning the before takeoff check, the actual airplane
must be positioned well-defined of additional aircraft. Right now there
should not be anything behind the actual airplane that may well
be damaged by the particular prop blast. With minimize
overheating throughout engine runup, it really is recommended
that the particular airplane be headed as almost because quite possible into
the wind. After the airplane is actually correctly positioned for
the runup, it will need to be enabled in order to roll forward slightly
thus which the actual nosewheel or alternatively tailwheel is going to be aligned fore
and aft.
In the course of the engine runup, the particular surface underneath the airplane
must be firm (a smooth, paved, or perhaps turf surface in the event that
possible) and free of debris. Otherwise, the actual propeller
can pick up pebbles, dirt, mud, sand, or simply additional loose
objects not to mention hurl them backwards. This damages the actual
propeller and in addition will damage the actual tail of the airplane.
Small chips within the leading edge of the propeller shape
stress risers, or lines of concentrated excellent stress. Many of these
happen to be highly undesirable and in addition may lead in order to cracks and also
quite possible propeller blade failing.
Whilst operating the actual engine runup, the pilot must
divide attention inside plus outside the particular airplane. If the
parking brake slips, or simply if application of the particular toe brakes
typically is inadequate for the actual amount of power applied, the particular
airplane can move forward unnoticed if attention typically is
fixed inside the particular airplane.
Every airplane has different qualities and in addition equipment,
and even the before takeoff checklist provided by the actual
airplane manufacturer and / or operator should really be employed in order to
perform the particular runup.