Kazan Helicopters Mi-17-1V Flight Manual page 57

M,,·17·1B. Flight manual
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TGT/imitat en Inestart
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Idlespeed envelope
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-60
60
90
70
80
Fig.3.3. Gas Generator Idle Speed and Maximum TGT (by T-1 02 Thermocouples) at
Engine Start versus Ambient Temperature
1. EGT limit at engine start
2. Idle speed envelope
(c) The gas rotor fails to accelerate during start (hangs) for
(d) No oil pressure in the engine or the main gearbox or the engine oil
pressure is less than 1 kgflcm
2
at a gas generator rotor speed
above 45%.
(e) Zero pressure in the hydraulic system and the collective pitch con-
trol lever spontaneously moves up.
(f)
The fuel fails to be ignited in the engine (the turbine inlet tempera-
ture fails to rise).
(g) Leakage of oil or fuel is detected:
(h) Torching from the exhaust pipe.
(i) The pneumatic starter fails to be disengaged at a gas generator ro-
tor speed of
60
to
65%,
this condition being indicated by illumination
of the STARTER ON (CTAPTEP PA60TAET) annunciator.
0) The engine fails to gain the idling speed within 60 sec.
(k) The main rotor fails to spin up upon attainment of the gas generator
rotor speed of 20 to 25%.
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