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pull Cb.
Switch on landing, nav lights and
pitot heat, check operation of all,
then switch off.
Turn the engine anti-ice actuator on
and off, listening to ensure that the
electrically operated valve is
functioning.
Repeat for Fuel Valve and leave
OFF. Draw sample of fuel from
tank drain and check for water.
Ensure flow stops when button is
released (if it doesn’t a sharp tap
where the fuel comes out usually
cures it). Note: There are 3 drains to
be considered (2 on the Bell 206L)
which must be operated on each
daily inspection, drawing approx half
a pint of fuel for sampling if
possible:
·  The fuel tank drain, electrically
or manually operated against a
spring loaded plunger directly
underneath the airframe. The
fuel valve must be OFF for
operation. 'A' series aircraft tend
to have manually operated ones.
·  The airframe fuel filter—port
side. Fuel pumps must be on, as
must be the fuel valve. Some
206Bs may have them on the
starboard side, as in the 206L.
·  The engine fuel filter (A or B).
Fuel pumps on, fuel valve on.
These drains must be operated on
each daily inspection, drawing
approx half a pint of fuel for
sampling if possible.
Fuel valve ON. Fuel pumps ON.
Check audibly in all cases. Check
fuel pressure indicated. Open port
engine cover and operate fuel filter
valve for a few seconds. This may be
on the starboard side for some
The Bell 206 151
earlier aircraft and will be for the
Bell 206L.
On the 206L, check fuel filter
caution light operation (the button is
on top of the filter). Operate engine
fuel drain for a few seconds. Check
samples for water, ensure fuel
pumps OFF.
Open the battery compartment,
check the battery and leads are
secure, check for corrosion in and
around the battery compartment,
close and secure the cover.
Check the pitot head is unobstructed
and secure. If not already in use,
open the external power supply
socket cover, inspect for cleanliness,
close and secure the cover.
Examine both landing lights,
filaments and perspex covers.
From the front, check the
windscreen, roof and cabin floor
perspex panels for cleanliness and
crazing, all cracks being drilled.
Check forward crosstube fairing,
antennae and battery vents on the
underside. Check roof antennae.
Check security of windscreen wipers.
Moving to the starboard, static vents
should be clean and unobstructed.
Open and close the cabin doors,
checking hinge nuts in safety and
door retaining straps. Ensure that
door locks are operating and each
door is secured. Check windows.
Make a thorough inspection of the
undercarriage including skids and
crosstubes and navigation lights,
ensuring that the starboard ones are
green. When flotation gear is fitted,
ensure that all press studs are secure
and that all flexible hoses and solid
pipes are secure and undamaged.
Remove fuel filler cap, inspect tank
contents and replace.
Check security and operation of
cargo hook, if fitted.
In cowling front compartment,
check hydraulic pipes for leaks,
hydraulic telltale button and levels
(not Bell 206L). Check rotation of
nuts on jacks.
Open transmission panel and check
inside of panel door for oil spray,
especially a dark stripe down the
middle. Inspect main gearbox oil
level and replenish as necessary –
level should be somewhere between
the bottom and the middle of the
glass. Inspect main driveshaft for
damage and couplings for grease
leakage. Inspect zinc chromate paint
stripes on each main driveshaft
coupling for discolouration, giving
evidence of overheating. Check the
front of the spur plate for evidence
of heavy landings (it will be lifting at
the front and there will be a mark on
the spur itself).
Check security of cowling fasteners,
main rotor mast, pitch change rods,
blade root fastenings and yoke for
cracks. Check damper levels. On the
Bell 206L, open the suspension flap
and inspect the nodal beam
mountings.
152 The Helicopter Pilot’s Handbook
Inspect engine inlet for foreign
matter.
Open the starboard hatch of the
engine compartment. Examine the
starboard and lower engine mounts
and attachment bolts for security.
Carefully examine all pipes, leads,
control links, ducts and mountings
for signs of leaks, damage or
　
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本文鏈接地址：The Helicopter Pilot’s Handbook(100)