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Horizontal stabiliser Cracks on outer
skin within 50mm of attachment.
Check for play
Tailboom and TGB fairings
Vertical fins
Tailrotor gearbox for oil levels,
sealing, chip plug
RHS Tailboom
Vertical Fin
Tail Rotor blades. Check tips,
wrinkles, abnormal noise at root
(meaning broken fibres).
Laminated half-bearings for
delaminations, cracks or
protrusions
Tail Rotor head, pitch change
rods for axial play
Pitch change spider bearing for
play
Tail rotor gearbox for security,
bellcrank hinge pin
Condition of sealing head
abnormal play
See-saw hinge teetering
bearings—cracks in rubber on
bearing outer zone
Control Spider—baffles, spacers
and lock washers should not
rotate
170 The Helicopter Pilot’s Handbook
Right Hand Side
Battery attachment
Baggage Hold door
Lower fairing panels
Landing gear shock strut
MGB Cowlings
Transmission support platform
Main gearbox
MGB suspension strut
Servo units and lines
Mast bearing magnetic plug
Engine Oil tank and system for
level, attachment and leaks,
chips at plug
Engine Oil radiator for
attachment and leaks
Universal Joint assembly.
Attachment, safety pins in and
locked
Hydraulic pump drive belt for
damage
Flexible coupling assembly for
attachment, disc condition,
cracks, broken strips
Engine support
Engine & compartment
Engine & MGB cowlings
Lower panels
Prestart
No Item Action
1 Performance, CG and
documentation
Checked
2 Hatches and
Harnesses
Secure, even those not occupied
3 HYD TEST button (on
collective)
Press for about 2 seconds to depressurise the yaw hydraulic accumulator
which will centre the yaw pedals.
4 Flight controls Check cyclic neutral and collective in low pitch, with frictions adjusted as
required, and lock on. You can't do much of a full and free check (and
neither should you try) because the droop stops are there.
5 Rotor brake Released – forward
6 Fuel shutoff lever Lockwired and forward
7 Fuel Flow Off
8 Battery Switch On. These should illuminate: HYD, GEN, MGB.P, PITOT, ENG.P. BAT
comes on as well if you are on external power. Check the battery voltage.
9 Warning lamps Test – FIRE light will take a second to come on
10 Bleed Valve Flag visible on NG indicator
11 Hydraulic pressure On (if isolated, the HORN light will come on)
12 Heating, demister, air
conditioning
Off
Start
No Item Action
1 Booster
pumps
On, wait 30 seconds to purge the system.
2 Fuel quantity
and pressure
Check
AS 350 171
No Item Action
and pressure
3 Start button Push 30 seconds after switching boost pumps on, and keep running through start
sequence (up to 40%). Minimum voltage drop is to 15v. If it falls below, abort, as you
may not get a light-up. If you do abort a start, close the fuel flow, and switch off the
fuel pump and generator. If it was due to high T4, check battery voltage. If normal,
crank the engine for 15 seconds and try again, increasing fuel flow gradually.
4 Fuel flow Move forward about a third when NG reaches 10% (if OAT is below zero, do this as
Start button is depressed).
5 NG Increasing
6 T4 Control with fuel flow – keep around 700 degs.
7 Rotors Turning
8 Start button Release between 40-45% NG
9 Oil pressure Rising
10 Fuel flow Accelerate smoothly to 68%-ish – do not allow NR to remain steady between 300-
320 RPM. Maintain until indication on oil temp gauge.
11 Warning lights These should go out: ENG.P (at 70%), MGB.P, HYD, HORN (on when HYD goes
out, then out from 250 RPM NR. Aural warning should go off about 350 RPM.
12 NR Pointer should be in green zone, near lower limit
13 Fuel flow Check in Flight position
14 External
power
Disconnect
15 GEN/BAT
lights
Out
16 Pitot heat On
17 Horn Switch on – check PITOT and HORN lights out
18 Warning lights All out
19 Voltage and
current
Check
20 Engine Oil
Pressure
Check
21 Booster
pumps
Operate separately, check pressures and FUEL.P light comes on
22 Electrics Switch on as required
23 Hydraulic
accumulator
Test: Lock collective, actuate test button to cut off pressure, HYD light should come
on, and horn should sound. Move cyclic 2-3 times along both axes for 10% of total
travel, there should be no control load. Press the test pushbutton to restore
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本文链接地址：
The Helicopter Pilot’s Handbook(111)
