Rotax 912 i Series Maintenance Manual page 55

SYSTEM DESCRIPTION
The ROTAX 912 iSc/iS has an electronically
controlled double-ignition system with an integ-
rated generator.
EMS POWER SUPPLY
The EMS power supply consists essentially of 2
permanent magnet generators. The two 3-phase
AC generators are physically separate power
supplies which are integrated in the engine. One
of the generators is used for the ECU and the
other is available to the aircraft frame.
DRIVE
They are driven by the crank drive and do not
need an external power supply once the engine
has reached idle speed.
Until idle speed is reached, a 12 V exter-
NOTE:
nal power supply of the EMS from the
aircraft's on-board power system.
SAFETY INFORMATION
WARNUNG WARNING
Danger of damage to engine!
There is a risk of short circuits and cable fires
during work on the electric system.
All installation work on the electric system
should be carried out with the engine switched
off and the battery (negative terminal) discon-
nected.
Ignition, main and LANE selector switches must
be "OFF"!
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
MAINTENANCE
As well as the maintenance and special checks,
see the relevant Maintenance Manual Line for
the respective 912 i Series engine type.
INTERNAL GENERATOR - REMOVAL
Before the internal generator is removed, the
work described below must be carried out to
identify any further faults in the internal genera-
tor and rectify them as part of repair work.
WARNUNG
If these checks are omitted, it may be necessary
to dismantle the internal generator again to
rectify any faults after repair work.
- General visual inspection. See relevant Main-
tenance Manual Line for the 912 i Series
engine type.
- Engine cleaning. See relevant Maintenance
Manual Line for the 912 i Series engine type.
- Carry out an engine test run. See relevant
Maintenance Manual Line for the 912 i Series
engine type.
NOTICE
24-20-00
Page 5
July 01/2012