MODULE 2

• Instruments and Warning Systems - where the pilot receives information about what the aircraft is doing
• The pilot receives of what the aircraft is doing through instruments and warning systems. These include:

  • Airspeed Indicators
  • Unsafe System Warnings
  • Remote Position Indicators
• Position and Warning Systems - the purpose of this section is to discuss systems that do nothing but indicate the position of components and warn of unsafe conditions
• Position and Warning Systems include:

  • Control Surface Indicator Systems
  • Take-off Warning Systems
  • Stall Warning Systems
• Control-Surface Indicating Systems - allow the flight crew to determine if a control surface is in the correct position for some phase of flight and to determine if a flight control is moving properly
• Takeoff Warning Indicator System - used to advise the pilot that one or more items are not properly positioned for takeoff
• The speed brake handle is in 0° POSITION, the steerable fuselage landing gear is CENTERED, the wing flaps are at 10° POSITION, and the leading-edge wing flaps are EXTENDED
• Takeoff Configuration Warning System -a safety device intended to help ensure that takeoff is not attempted with the aircraft in an inappropriate or unsafe configuration
• Since the late 1970's regulations have required that a Takeoff Configuration Warning System be fitted in all jet aircraft and in non-jet aircraft with a maximum takeoff weight exceeding 6000 lbs (2725 kg)
• Takeoff Warning System - intended to serve as "back-up" for the normal checklist
• Stall Warning Indicator - designed to indicate to the pilot when the aircraft is close to the stalling angle of attack
• When the stall warning system is activated, the pilot will be given one or more of the following indications:

  • A horn will sound
  • A light will illuminate
  • A stick shaker will start vibrating the control wheel column
• Pneumatic Stall Warning Indication System - a stall warning indication system used by some light aircraft
• Angle of Attack (AOA) - the angle formed between the wing cord centerline and the relative wind. At a certain angle
• Point of Stagnation - the point on the wing leading edge where the oncoming air diverges
• Auxiliary Power Units (APU) - are electrical power (and heat) sources for mobile systems operating independently from the main engine responsible for the propulsion
• Internal Combustion Engines (ICE) - opens the potential to optimize separately the function of traction or propulsion and the supply of electricity
• APU Operations Panel - usually includes controls for the APU start and stop, fire-protection test and indicating, and the fire extinguisher manual discharge discussed earlier in this chapter