Failure Of Autopilot - Kazan Helicopters Mi-17-1V Flight Manual

MI1·17·1B. Flight manual
(d) Monitor the operating rectifier current by reading the ammeter on
the DC POWER control panel. The current drawn should not ex-
ceed 200 A.
(e) The Captain should make a decision to either abort the mission and
return to the departure aerodrome or land on an alternate aero-
drome.
6.18.5. Failure of ,[IMP-200,[l equipment
(1) Indications
(a) The BAIT red annunciator lights up.
(2) Crew's actions:
(a) Make sure that the rectifier bus voltage is not less than 27V, the
battery ammeters read the discharge current (the pointer is to the
right from the scale zero point);
(b) unlock the safety latch and turn on the CCT TO RECT (CETb HA
BY) switch located on the cockpit center pedestal.
(c) Make sure that BAIT annunciator has gone out, the batteries N1
&N2 voltage has increased up to 27V and the ammeters read the
charge current.
(d) Continue performing the mission.
Warning: If the CCT TO RECT switch being turned on, the ammeters
persist to read the discharge current the Captain should make
decision: continue the flight up to the nearest aerodrome or
land the helicopter on the chosen landing field.
6.19. Failure of autopilot
(1) Main indications of failure
(a) An insignificant but clearly felt jerk of the helicopter in yaw, roll,
pitch or altitude with simultaneous displacement of the trim indicator
respective channel movable index to an extreme position.
(b) Occurrence of helicopter oscillation about one of the axes accom-
panied by oscillations of the trim indicator respective channel mov-
able index.
(c) Slow change in the established flight regime.
(2) Crew's actions
(a) In case of changes in the helicopter attitude timely apply the flight
controls to prevent rotation of the helicopter and establish horizontal
straightforward flight. Determine the failed channel (channels) of the
autopilot which in indicated by a displacement of the movable index
of the trim indicator to the extreme position on the autopilot control-
ler. Disengage the failed channel and make sure the helicopter can
be flown with the channel inoperative. Make a.decision to either
continue or abort the mission.
(b) If the helicopter oscillation occurs, disengage the autopilot by de-
pression of the button located on the cyclic pitch control stick and
make sure the helicopter oscillation has discontinued.
(c) Engage the autopilot channels in succession and monitor occur-
rence of the helicopter oscillation. As soon as the oscillation occurs
disengage the channel whose engagement has caused oscillation.
(d) Make sure the helicopter can be flown with the failed channel inop-
6-24