Pilot's Operating Handbook
Section 4
Normal procedures
EASA Approved
Edition 1 - January 15, 2018
Rev. 2
Page 4.4.27
Motoring 1/3
To drain fuel accumulated inside the combustion chamber, a motoring procedure is
required following an aborted start.
A 15-second dry motoring run is sufficient to clear any fuel pooled in the engine. The
fuel is removed in liquid or vapor form, through an airflow intended to dry combustion
chamber, turbines and exhaust nozzles.
To improve cooling of the bearing cavities and prevent oil coking after shutdown in
high OAT [above 35° C (95° F)] environment, it is recommended to perform a
30-second dry motoring run.
It is possible that no trace of drainage be observed under engine, due to the drainage
collector intended to prevent parking area from contamination.
▲ CAUTION ▲
After any starting interrupt procedure, wait for engine total shutdown
and wait at least 30 seconds before initiating a motoring.
▲
Engine controls
1 - MAN OVRD control Full backward (notched). . . . . . . . . . . . . . . . . . . . . .
▲ CAUTION ▲
When the engine is shut down, the
THROTTLE
must not be moved into
the reverse area.
▲
2 - THROTTLE CUT OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 - IGNITION switch OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - IGNITION Check OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel
5 - FUEL TANK SELECTOR L or R. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 - AUX BP switch ON. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 -
AUX BOOST PMP ON Check ON. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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