Unstable Operation Of Engine; Failure Ofturbine Gas Temperature (Tgt) Control; Failure Offuel System (Fuel Booster And Transfer Pumps); Failure Of Fuel Booster Pump - Kazan Helicopters Mi-17-1V Flight Manual

MIl·17·1B. Flight manual
(C) If the engine oil pressure and temperature exceed the admissible
limits, abort the mission, shut the engine down and proceed ac-
cording to instructions given in subsection 6.1. "Failure of one en-
gine"
6.8. Unstable operation of engine
(1) Indications
(a) Characteristic noise produced by the engines (rough operation).
(b) Sharp drop of the engine gas generator rotor speed.
(c) TGT rise.
(d) Sharp drop of the compressor delivery pressure (oscillatory in na-
ture) displayed as sharp oscillation of the V1P-117 EPR indicator
side index.
(2) Pilot's actions:
(a) In case of indications of engine unstable operation move the sepa-
rate throttle control lever of the affected engine to IDLE position. If
after that the gas generator rotational speed and TGT correspond to
idle rating, move the throttle lever again to reset the initial power
rating. If the engine operation persists to be unstable, press, the
APU being off, the engine start button for 1-2 sec., close the HP fuel
shutoff valve for 1-2 sec. and open it again. If after that the engine
gains the gas generator RPM and TGT which correspond to IDLE
mode reset the initial power rating by moving the separate throttle
control lever.
(b) If the engine operation persists to be unstable start the APU.
(c) Shut the engine down by the HP fuel shut off valve and perform the
starting. Perform the starting at an altitude H::;4000 m. If it proves
impossible to discontinue surging, shut down the affected engine
and proceed as instructed for the case of failure of one engine.
6.9. Failure ofturbine gas temperature (TGT) control
(1) Indications
(a) The TGT indicator reads 990°C or more.
(2) Pilot's actions
(a) Reduce the engine power setting and avoid the gas generator rotor
run at a speed beyond 101 %.
(b) Continue fulfilment of the mission, increase alertness in monitoring
TGT.
6.10. Failure of fuel system (fuel booster and transfer pumps)
6.10.1. Failure of Fuel Booster Pump
(1) Indications
(a) The NO FLOW (PACXO.Q HE PA50TAET) annunciator goes on
upon failure of the service fuel tank booster pump.
(b) Failure of the fuel booster pump may be accompanied by a momen-
tary engine speed drop by 2 to 5 %, a fuel pressure drop by 3 to 4
kgf/cm
2
and a main rotor speed drop by 1 to 3 %.
(c) The PV1-65 voice warning system gives the message:
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