Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов, Страница: 220 / 923

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Revision A4: Sep, 2010
Section III Sub-section 9
ELECTRICAL POWER
Pilot’s Operating Manual
ENGINE START USING EXTERNAL POWER
Selecting the EXT PWR switch to ON with a suitable external power supply unit will energize all busbars
including the start busbar providing that internal start power has not been previously selected.
Operation of the START PWR push switch illuminates the PWR ON/PUSH FOR ABORT annunciator
and brings the start circuit to a state of readiness for ENGINE START switch selection. This push switch
operation also inhibits an internal start.
A warning horn will sound if the switch is operated and the LANDING GEAR selector is not in the down
position.
NOTES:
1. No. 1 avionics and other essential loads should only be used prior to engine starting.
2. No. 2 engine is started first and then its generator is used as detailed below.
At ENGINE START switch operation (ENG 1 or 2) the Generator Control Unit (GCU) initiates the start
cycle. Illumination of the OPERATING annunciator indicates completion of the start hold-on circuit,
allowing release of the ENGINE START switch.
With the start busbar connected to the starter/generator, the engine motors. When N
2
RPM reaches
10% or more and N
1
is indicating, the HP cock is selected open to supply fuel to the engine and also
energizes the igniter unit through the HP cock microswitch.
As the engine reaches self sustaining speed, the GCU initiates a start cut-off sequence. At cut-off, the
OPERATING annunciator extinguishes.
ABORT START
The starting sequence may be aborted at any time by a second operation of the START PWR switch.
This initiates a start cut-off sequence by removing the supply to the GCU and extinguishes the PWR
ON PUSH FOR ABORT and OPERATING annunciators.
ENGINE START
START
PWR ENG 1 ENG 2
Overhead Roof Panel
PWR ON
PUSH FOR
ABORT
OPERATING OPERATING