Operation Of Systems; Anti-Icing System - Kazan Helicopters Mi-17-1V Flight Manual

M,,·17·1B. Flight manual
7.
OPERATION OF SYSTEMS
7.1 Anti-icing system
(1) Check the anti-icing system before flight at an ambient temperature of
+5°C or below, as well as before flight in IMC.
Caution: Check the rotor blade anti-ice system only with the engines
running.
After starting the engines and with the generators operating normally
functionally check the anti-icing system proceeding in the following way:
(a) Switch on the ANTI-ICING SYSTEM
(npOTII1B006JlE,QEHII1TEJlbHMl CII1CTEMA), CONTROL
(ynPABJlEHII1E) ENG DUST PROT, LEFT (my ,QB111rAT.
JlEBOro), ENG DUST PROT RIGHT (n3Y ,QBlI1rAT. nPABoro),
ice detector, HEATING W/S (060rPEB CTEKOJl) circuit breakers.
(b) On the anti-icing system control panel set the MAN-AUTO (PY4H-
ABTOMAT) selector switch to MAN (PY4H). This done, the main
and tail rotor, windshield, right engine, right forward and right rear
dust protection devices anti-icers become energised and the ANTI
ICE ON (nOC BKJlI04EHA) R ENG ANTI-ICE (060rPEB ,QBlI1r.
np.), R DUST PROT FWD (nPAB my nEPE,QH) and R DUST
PROT REAR (nPAB. n3Y 3A,QH.) annunciators come on, but the
left engine, the left forward and rear dust protection devices anti-
icing remain off.
The left engine anti-icing should be switched on manually and the L
ENG ANTI-ICE (060rPEB ,QBlI1r. JlEB.), L DUST PROT FWD
(JlEB. my nEPE,QH) and L DUST PROT REAR (JlEB. my 3A.QH)
annunciators come on.
(c) Set the LOAD CURRENT (TOK nOTPE6I11TEJlEVI) selector switch
alternately to MAIN ROTOR BLADES 1-2-3-4-5 (JlOnACTII1
HECYll.\. BII1HTA 1-2-3-4-5 and read the ammeter to check the cur-
rent drawn by each section of the main rotor blade anti-icing system.
The hUmber bfsection Undertestis determined by illumination of the
SECTION 1 (1 CEKIlIl15'l), SECTION 2 (2 CEKIlIl15'l), SECTION 3 (3
CEKIlIl15'l), SECTION 4 (4 CEKIlIl15'l) lights. The ammeter reading for
each section of the main rotor blade heaters should be within the
limits of 60 to 80 A.
(d) Set the LOAD CURRENT (TOK nOTPE6I11TEJlEVI) selector switch
to TAIL ROTOR (XBOCT. BII1HT). The anti-icing system ammeter
readings for the tail rotor blades heaters should be within the limits
of110 to 150 A.
Caution: It is allowed to energize the main and tail rotor blade
anti-icing system on the ground for a period of one cycle.
lf.the check is not completed during cycle energize the
anti-icing to complete the check not earlier then in five
minutes.
(e) Functionally check the windshield heaters by setting the wafer selector
switch to HEATING W/S (060rPEB CTEKOJl), and the anti-icing sys-
tem ammeterreadingsshould be withinthe limits of 40 to 90 A.
The actual value of current drawn is obtained after dividing the am-
7-3