Oxygen Equipment - Kazan Helicopters Mi-17-1V Flight Manual

MI1-17-1B. Flight manual
(KOHTP nVlT) and CODE ON (KO,Q BKJl) lights and momentary flashes
of the TRANSMISSION (Vl3JlY4) lights.
7.3. Oxygen equipment
Warning: In flights at altitudes above 4000 m use the oxygen equip-
ment.
(1) Before a flight in which the use of oxygen equipment is anticipated in-
spect and functionally check the oxygen equipment for which purpose
each crew member should do the following:
(a) Make sure the KKO-JlC oxygen equipment sets are installed and se-
curely fastened.
(b) Make sure the P-38 connector disconnect is locked.
(c) Fasten the P-58 connector with its lock to the right leg loop below
the circular strap semi-loop, and the Kn-58 oxygen regulator on the
circular strap at the right side below the parachute harness shoulder
buckle.
(d) Connect the P-58 connector cord snap hook to the bracket fastened
to the seat pan, and adjust the cord length so as the cord does not
hinder the crew member's motions in flight and free from excessive
slackness.
(e) Connect the KM-16H oxygen mask to the Kn-58 oxygen regulator,
don the mask and fit it against the face. Then jam the mask corru-
gated hose and try to make an inhalation. If it proves to be impossi-
ble the mask is tight and properly fitted.
(f) Open the Kn-21 oxygen regulator cutoff valve and read the pressure
gauge to make sure the oxygen pressure in the bottle is normal (30
kgf/cm
2
at an ambient temperature of 15 to 20°C).
(g) Functionally check the KKO-JlC oxygen equipment act for which pur-
pose open the Kn-21 oxygen regulator emergency delivery valve
and make several inhalations and exhalations. If breathing is not
hindered and the oxygen flow indicator float responds to inhalation
and exhalation the KKO-JlC oxygen equipment set is considered OK.
(h) Close the Kn-21 oxygen regulator emergency delivery valve.
(2) To use the oxygen equipment in flight proceed as follows'
(a) Make sure the KVI-16H mask is fitted properly, connected to the Kn-
58 oxygen regulator and the Kn-21 oxygen regulator cutoff valve is
open.
(b) At an altitude of 2000 m observe the oxygen flow indicator to make
sure breathing oxygen is supplied.
(c) Periodically monitor the oxygen flow indicator which should respond
to inhalation and exhalation and periodically check the oxygen bottle
pressure. If the oxygen pressure in one of the crew members' bottles
drops to 10 kgf/cm
2
,
descend to an altitude not exceeding 4000 m.
Warning: In case of failure of the oxygen regUlator, difficUlties in breath-
ing or feeling open the Kn-21 oxygen regulator emergency
delivery valve.
(3) The oxygen supply in the KKO-JlC oxygen equipment bottle is adequate
for flying with the oxygen used for not more than 45 min, at altitudes of
4000 to 5000 m for not more than 30 min, at altitudes of 5000 to 6000 m
for not more than 20 min.
(4) The functional check of the oxygen equipment set provided with the KM-
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