BUS

BUS, single wire or group of wires that conduct electrical power, information or Timing between the various blocks and modules.

BUS DRUM

Drive drum, a mechanical connection with pulleys and cables in the control system.

BUS PROTECTION PANEL

PROTECTIVE PANEL BUS module (black box) that contains electrical circuits for control and protection, when applying an electrical alternating current in an airplane.

BUTTOCK LINE

LINE OF SYMMETRY (gluteal line), reference line along the fuselage in a top horizontal measurement plane.

BYPASS VALVE

PRESSURE VALVE valve through which air or liquid, when locked to the main passage for current.

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