Which component is NOT typically driven by the accessory gearbox (AGB)?

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Prepare for the Gas Turbine Systems Technician – Mechanical A School Test 1. Study with multiple choice questions that come with hints and explanations. Ace your exam!

Multiple Choice

Which component is NOT typically driven by the accessory gearbox (AGB)?

Explanation:
The accessory gearbox provides drive to engine accessories by taking power from the engine’s high-pressure spool. It drives items like the main fuel pump, the lubrication pump, and the starting motor, allowing them to operate as the engine runs or is started. The main turbine blade, however, is part of the turbine rotor and is driven directly by the expanding hot gases from the combustor, not by the AGB. So the component not typically driven by the accessory gearbox is the main turbine blade.

The accessory gearbox provides drive to engine accessories by taking power from the engine’s high-pressure spool. It drives items like the main fuel pump, the lubrication pump, and the starting motor, allowing them to operate as the engine runs or is started. The main turbine blade, however, is part of the turbine rotor and is driven directly by the expanding hot gases from the combustor, not by the AGB. So the component not typically driven by the accessory gearbox is the main turbine blade.

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