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The battery and emergency buses normally tie to the main system, but they may isolate to only the battery or external power sources.

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QUESTION 20 The generators are engine-starting motors that revert to generators at the completion of the start cycle. Each generator system operates independently, but power distributes evenly through bus systems that are in parallel except during fault conditions.

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During normal operation, the generators share loads equally (within plus or minus 10% of the total load) via the crossfeed bus. Each starter-generator is regulated by its own generator control unit (GCU).

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With the battery disconnect switch in the battery disconnect position:

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If a ground power unit is being used to start the engines, the generator switches should be in which position?

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With the battery switch in EMER and the generators OFF, battery life should be a minimum of:

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For engine start with a sealed lead-acid battery, minimum battery voltage is:

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Battery starts are limited to:

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A GPU can be connected to the aircraft DC system through a receptacle in the fuselage below the right engine nacelle. External power is routed through the external power relay to the battery bus. The battery cannot be charged from the GPU, regardless of the battery switch position.

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The battery charges from the GPU, regardless of the battery switch position. If the battery is charged using the GPU, it must be monitored. Current from most GPUs is not regulated and a battery overheat may occur.

A BATTERY disconnect switch is in the cockpit on the left side console panel.

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The maximum electrical load per generator on the ground at idle is limited to:

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What is indicated by illumination of the light in the start buttons?

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The wing and tail deice systems are inoperative with the battery switch in the:

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If the AFT JBOX LMT L CAS message is displayed in the CAS window, what bus or busses would be lost if the L generator fails?

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What action should be taken if the engine starter fails to disengage?

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Normal distribution of DC power is via a left and right feed bus connected by a crossfeed bus.

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From the main bus system in the tail cone, power is distributed through circuit breakers in the tail cone directly to a few electrical devices in or near the tail cone.

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The Mustang electrical system primarily provides 24-VDC power to operate electrical devices throughout the aircraft.

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The Mustang electrical system primarily provides 28-VDC power to operate electrical devices throughout the aircraft.

When the BATT switch is in the EMER position, _____ is supplied from the battery bus through the emergency power relay to the emergency bus circuit breakers on each cockpit CB panel.

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With the battery switch in the EMER position and the generators OFF, there is no:

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What does the BATT TEMP FAIL CAS message indicate?

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With the STBY INST switch in the BATT TEST position, the pilot should see the following indication:

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The battery is in _____.

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With the battery switch in the EMER position, some aural warnings are NOT available, including:

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Citation Mustang – Electrical