Pratt & Whitney Rzeszów S.A.
MAINTENANCE MANUAL
PZL-10W ENGINE
2015.12.30
71-02-00
Page 509
Export Control Classification: PL/UE 9E999
(d)
The periodical engine startings are recommended if there is necessity to have the
helicopter ready to flight during long time parking on a airfield with no required heating
facilities for preheating the engine elements with hot air at ambient temperature below 243
K (-30°C; -22°F) if the oil acc. to subitem B.{1) is used or below 248 K (~25°C; -13°F) if the
oli acc. to subitem C. (1 ) is used. Startings shall be performed when the oil temperature in
the tank drops down to 268 K (minus 5°C; 23°F) and the engine shall operate at the ground
idle rating, until oil temperature increase to 293 K ( + 20°C; 68°F) and then at flight idle
rating untill oil temperature increase to 313 K 323
K
( + 40°C ÷ 50°C; + 1 04°F ÷ 122°F).
If the helicopter is required to be ready for flight earlier, it is allowed to advance the engine
from the Ground Idle to the Flight Idle after the oil temperature in the engine tank reach
273K (0°C, 32°F). Then, the engine should continue run at the Flight Idle till the oil
temperature reach 293K ( + 20°C, 68°F). Following this, it is allowed to attempt the take-off
and flight procedures of the helicopter.
During initial phase of flight, the oil temperature in the tank will rise to min. 313K ( + 40°C,
104°F) (min. conditions for continue a flight).
The procedure as above applies for non-icing conditions only.
(e)
The period between consecutive starter motor activations should not be shorter than 3
minutes. Should this condition not be met, then after three consecutive starter motor
activations it is required to take a 45-minute break to allow the starter motor to cool down.
(f)
It is recommended to attempt the post-shut-down engine start not earlier than 3 minutes
after the engine stops, provided that the compressor turbine outlet temperature drops
below 543 K (270°C; 51 8°F).
(g)
Starting of engine with the electronic limiters unit switched off or out of order or with
switched off the electrohydraulic servovalve of fuel metering pump (in other words under
manual control mode) is forbidden.
(h)
Prior to shutdown under normal conditions 2 ÷ 3 minutes ground idle cooling operation is
required.
(4)
Air bleeds controlled by the pilot and conditions for their use.
(a)
Air bleed for helicopter cabin ventilation can be switched on at ranges up to MAXIMUM
CONTINUOUS and ambient air temperatures up to 318 K ( + 45°C; 1 1 3 ° F ) and at
ranges up to TAKE-OFF at ambient temperature up to 288 K ( + 1 5 ° C ; 5 9 ° F ) .
(b)
Air bleed for dust separator can be switched on at ranges up to TAKE-OFF and at ambient
temperatures up to 288 K ( + 1 5 ° C ; 59
0
F).
(c)
Air bleed for icing protection system can be switched on at all ranges at ambient
temperatures up to 278 K {+ 5 ° C ; 41 °F).
