Which statement about the CRJ-550's engine idle states is accurate?

Which statement about the CRJ-550's engine idle states is accurate?

• A. The five engine idle states are Flight, Approach, Landing, Reverse, Ground.
• B. The five engine idle states are Flight, Approach, Landing, Idle, Ground.
• C. The five engine idle states are Flight, Takeoff, Climb, Descent, Ground.
• D. The five engine idle states are Flight, Approach, Landing, Reverse, Cruise.

Answer: (A)

Engine idle states are about the engine power setting tied to how the airplane is operating. For the CRJ-550 there are five distinct idle states: Flight idle when you’re airborne and maintaining flight power; Approach idle during the descent and setup for landing; Landing idle for the runway roll with engines at low thrust after touchdown; Reverse when thrust reversers are deployed to help slow the airplane after landing; Ground idle when the aircraft is on the ground and engines are at idle for taxi or pre/post-flight operations. This set covers the typical phases of operation that require low-thrust, controlled engine performance on the CRJ-550. Other choices mix in flight phases like Takeoff, Climb, Descent, or Cruise, which aren’t idle states, or include Idle as a separate state, which isn’t how the CRJ-550 classifies engine idle modes.

Engine idle states are about the engine power setting tied to how the airplane is operating. For the CRJ-550 there are five distinct idle states: Flight idle when you’re airborne and maintaining flight power; Approach idle during the descent and setup for landing; Landing idle for the runway roll with engines at low thrust after touchdown; Reverse when thrust reversers are deployed to help slow the airplane after landing; Ground idle when the aircraft is on the ground and engines are at idle for taxi or pre/post-flight operations. This set covers the typical phases of operation that require low-thrust, controlled engine performance on the CRJ-550. Other choices mix in flight phases like Takeoff, Climb, Descent, or Cruise, which aren’t idle states, or include Idle as a separate state, which isn’t how the CRJ-550 classifies engine idle modes.