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1 Area and
rotors
Clear, switch anti-collision light on
2 TOT Below 150 degs C
3 Starter
button
Press
4 Throttle Open at 15% N1 and when TOT is less than 150 degs C (that’s what the book says).
Light-up should occur within 20 seconds. With C20 and C20R engines, you can start
earlier than 15%—in fact, between 12-15%, provided the N1 is accelerating in that
156 The Helicopter Pilot’s Handbook
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earlier than 15%—in fact, between 12-15%, provided the N1 is accelerating in that
range, in these temperature ranges:
-18 12%
-18—+7 13%
> +7 15%
Expect a higher than normal TOT, but not usually above the top end of the yellow band.
Do not attempt to start below 12%, or if the N1 RPM peaks at any point inside the
above range, because the engine still relies on assistance from the battery until a very
late stage in the cycle, and you will be wasting power unnecessarily. If the engine is
going too slowly to provide proper cooling airflow, you will get a hot start and a melted
back end. A good start should take only 25 seconds from when fuel is introduced to
reaching Ground Idle.
Expect to see the temperature peak twice.
You now have to check for three other things at the same time:
5 TOT Should stay in the yellow band, although when starting, you can enter the range 793-
927 degs C for 10 secs. Not above 927. You can do this because the engine is not
spinning fast enough to cause turbine blade creep.
6 Eng Oil
pressure
Rising
7 Blades Turning by 25% N1. A corollary of this is that if you start with the blades tied down, as
all of us have at some stage, as long as you stop before 25%, you can keep it a secret.
Any later than that may cause a strain on the transmission and a scorch on the blade
over the tail boom.
8 Other T &
Ps
Check, but don’t expect too much out of the temperature gauges for a while, especially
if it’s cold.
9 Starter Release at 58% N1. Idle at 62% for 1 min if it has been shut down for over 15 mins, to
give the temperatures time to stabilise and the battery a chance to recover before
switching the generator on (if the generator has to pump out too much, it will draw too
much from the engine, since it is on the compressor drive train. This is why the
generator has to be switched off for some performance graphs and the generator is
sometimes turned off by pilots who need a little TOT advantage on a hot day).
10 Ext power Remove, switch on battery if not already on.
11 Hydraulics While you are waiting for the minute mentioned above, undo the control frictions, switch
off the hydraulics and check the operation of the controls, and the sloppy linkage. You
are looking to see if the hydraulics are motoring, that is, moving by themselves.
Engine Fire During Start
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1 Starter Keep running for airflow
2 Ignition Cb Out
3 Throttle/fuel valve Close
4 Battery Off
Run Up
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1 Throttle Open to 70% N1
2 Generator Switch on, wait until the Loadmeter reads less than .7. the reason
The Bell 206 157
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3 Electrics Switch everything on, usually the radios, navaids and gyros. No flags should be
showing.
4 Ts & Ps Should be within limits.
5 Throttle Open, but don’t go above 40% Torque, which will help stop you spinning if the ground
is slippery.
6 Beep range Check the full range, leave at maximum. Although the range should be 95-100%, many
engineers set it at 96-101%, particularly if the FCU is a bit dodgy.
7 Anti-ice Make sure the TOT rises. Leave on if you are going to be flying in visible moisture
below 4.4 degs C.
8 Hydraulics Switch off, check cyclic movement in X-pattern, leave on.
9 Throttle Retard (not too quickly), to stabilise at 62% N1 inside 3 secs.
10 Instruments Set—altimeters, DGI. A/H, etc
Pre Takeoff
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1 Throttle Fully open, NR 100%
2 Warning lights Test—all off
3 Ts and Ps Within limits
4 Hydraulics On
5 Engine anti-ice As required
6 Overhead Cbs As required
7 Nav/Anti-col Lts On
8 Pitot heat As required
9 Altimeter Set
10 Flight Instruments Set—DGI
11 Hatches/Harnesses Secure
Hover
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1 Ts and Ps Within limits
2 Controls Central, response
3 Instruments Response to control input
4 CG Within limits
Descent/Landing
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1 Ts and Ps Within limits
2 Heater To Vent or off
3 Hatches/Harnesses Secure
4 Altimeter Set
Shutdown
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本文链接地址：
The Helicopter Pilot’s Handbook(103)
