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page 10 - 17
Jan. 01/2007
Effectivity: 912 Serie
OM Edition 1 / Rev. 0
BRP-Rotax
10.3.5) Prior to take-off
Warming up period:
Start warming up period at 2000 r.p.m. for approx. 2 minutes, continue
at 2500 r.p.m., duration depending on ambient temperature, until oil
temperature reaches 50 °C (120 °F).
— Check temperatures and pressures.
Throttle response:
— Short full throttle ground test (consult Aircraft Operator's Manual
since engine speed depends on the propeller used).
■ CAUTION: After a full-load ground test allow a short cooling
run to prevent vapour formation in the cylinder
head.
Ignition check:
Check the two ignition circuits at 4000 r.p.m. (approx. 1700 r.p.m.
propeller).
— Speed drop with only one ignition circuit must not exceed 300
r.p.m. (approx. 130 r.p.m. propeller).
— 115 r.p.m. (approx. 50 r.p.m. propeller) max. difference of speed
by use of either circuit, A or B.
◆ NOTE: The propeller speed depends on the actual reduc-
tion ratio.
Check of hydraulic propeller governor:
Check control of the hydraulic propeller governor to specifications of
the manufacturer.
10.3.6) Take-off
Climbing with engine running at take-off performance is permissible
(max. 5 minutes). See Chapter 10.1), 10.1.1) and 10.1.2).
▲ WARNING: Monitor oil temperature, cylinder head temperature
and oil pressure. Limits must not be exceeded!
See Chapter 10.1) Operating Limits.
■ CAUTION: Respect "cold weather operation" recommenda-
tions, see Chapter 10.3.9).
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