Under which condition does ACMP 2 turn on automatically on the ground?

ACMP 2, which stands for Auxiliary Constant Frequency Motor Pump 2, is designed to facilitate hydraulic flow to critical systems under specific operational conditions, particularly when the aircraft is on the ground.

The correct answer indicates that ACMP 2 activates automatically under the conditions described in both scenarios A and B. In scenario A, when the flaps are set to a position greater than 0 and either the thrust is in the TOGA (Takeoff/Go-Around) setting or the airspeed exceeds 50 knots, the system prioritizes hydraulic power to support necessary operations, enhancing safety and control during ground maneuvering. In scenario B, if the aircraft is performing a single-engine taxi with engine 1 running and the pneumatic bleed (PB) system is off, ACMP 2 engages to maintain hydraulic availability since single-engine operations can reduce some hydraulic outputs.

By identifying the combination in which both conditions ensure the need for hydraulic power management under differing operational states, it becomes evident that the activation of ACMP 2 serves a critical role in maintaining operational integrity and responsiveness of the system when on the ground. Thus, the correct answer reflects a scenario of preparedness for essential systems’ functionality in various ground conditions.