Pilot’s Operating Handbook Section 7
EXTRA 500 Description of Airplane and Systems
7.14.k Engine Starting
1 General
The engine starting system consists of the engine starting panel
(see
Figure 7-13) with the ENGINE START switch with three
positions,
START, IGN and IGN OFF and on the left side the
ENGINE MOTORING (cranking) switch with the positions
MOTORING, ABORT and NORMAL.
Engine starting will be performed automatically by the
generator control unit (GCU).
2 Engine Starting
The engine start up sequence will be initiated by momentarily
switching the
ENGINE START switch to START position and
then back to
IGN. The ENGINE MOTORING switch has to be in
the
NORMAL position. The GCU automatically activates the
starter-generator, which drives the N1, gas producer generator.
After reaching necessary N1 rpm, the condition lever must be
set manually to
FUEL ON position to continue the start up
sequence. N1 rpm, TOT indication and oil pressure must be
monitored continuously by the pilot during engine start up
phase.
After reaching safe engine rpm, the GCU automatically
switches off the starter-generator.
3 Description of Switches
ENGINE MOTORING
Set to NORMAL position allows the automatically GCU start
sequence and remains in
NORMAL position in aircraft normal
operation.
Switching to ABORT position will interrupt the engine electric
start sequence as well as engine ignition. Fuel has to be cut off
using the condition lever.
In the
MOTORING position, the starter-generator motors the N1
gas producer generator with de-activated ignition sequence. The
MOTORING switch function can be used to clean the engine
after unsuccessful start up (aborted start up) and/or to cool
engine down before initiating a start up sequence. Also for
compressor wash (maintenance) activities the
MOTORING
function can be used.
26. January 2011 7-35
To Next Page
Loading...
