Which electrical source powers the left direct current motor pump (DCMP)?

The left direct current motor pump (DCMP) is powered by the right generator. This is because, in many aircraft systems, specific components are designed to be powered by designated generators to ensure balanced load distribution and reliability of the electrical systems. The right generator often supplies power to certain left-side components, including the left DCMP, especially in situations where redundancy is necessary.

In contrast, the left generator typically powers the left side of the aircraft's systems, while auxiliary batteries are meant for backup power and are not used for normal operations of systems like the DCMP under regular conditions. Meanwhile, the power transfer unit serves a different function, primarily in the management and distribution of electrical power rather than directly powering the motors or pumps. Thus, the designations for power distribution are crucial for understanding which generator supplies specific electrical components.