Kazan Helicopters Mi-17-1V Flight Manual page 58

MI1-17-1B. Flight manual
(I) Kicking engagement of the freewheel clutch accompanied by a
sharp sound in the area of the main gearbox and shaking of the
helicopter.
(m) The engine inlet oil pressure is less than 2 kgf/cm
2
at idle or the
main gearbox oil pressure is less than 0.5 kgflcm
2
.
(n) A necessity arises to shut down the At'l-9B APU.
(0) The ground observer issues a signal to stop the start.
Caution: 1.lt is allowed to start and shut down the engines only at wind
speed not exceeding the limits indicated in Table 2.4.
2.lt is allowed to restart the engine only after the gas generator
rotor comes to a complete stop or after cranking if the engine
start has been discontinued due to failure to light up or TGT
over temperature.
3.Never start the engine if its instruments are faulty.
4.lt is allowed to restart the engine only after the reasons for un-
successful starts are cleared and eliminated. In so doing, the
restarting attempt should be preceded by cranking for the pur-
pose of purging.
5.The number of starts following each other and the time inter-
vals between them should not exceed the respective limits in-
dicated in caution, 7 and 9 (Ref. 3.5(4)).
6. Never start the engines if ice exists at the dust protection de-
vices, air intakes and the main and tail rotors blades.
7.At ambient temperatures of +5°C or below switch on the en-
gines and air intakes heaters immediately after start of the en-
gines if an excessive air humidity (drizzle, wet snow) exists.
8.ln case of strong gusty wind having a speed of 15 to 25
mls
the maximum clearance between the spinning blade of the
main rotor and the tail boom is provided with the helicopter so
positioned that it is blown by the left side headwind at an an-
gie of 45°.
9.Further operation of the HP-3BM fuel flow control unit after an
to start the engine with the fuel fire shutoff valves
10. Never operate the engine start selector switch until the engine
being started gains the idling speed.
11. At ambient temperature of +5°C or below crank the compres-
sor rotor and the free turbine rotor without applying excessive
forces.
If the compressor rotor blades are frozen to the stationary
components or icing is detected on the engine components
. heatthe engine with .hot··airatalemperatlfrefbtexceedihg
80°C using ground heaters for the purpose deliver hot air into
the engine gas flow duct. After heating make sure that the ro-
tors rotate easily and are free from ice.
(13) After the engines are started, the ground electrical power source is dis-
connected and the AC generators energize the aircraft electrical system
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