MEP.1.1.2.5 Electrical System

Question 1

Of what does the electrical system of a twin consist?

Answer 1

Bus bars energised by both alternators

Question 2

What is a bus bar?

Answer 2

Device that distributes the electrical energy to various services

Question 3

What happens if one engine or alternator fails?

Answer 3

The bus bar is still sutained by the live alternator.

However, some loads may have to be shed.

Question 4

What do some aircraft incorporate in their electrical systems?

Answer 4

An automatic load shedding bus which downloads non-essential or less important electrical services in the event of reduced electrical power

Question 5

What are the critical times in the electrical system?

Answer 5

When one engine or alternator fails and you need services that require a substantial load such as the landing light, dmist fans or blowers, pitot heat and flaps.

Question 6

What’s good news about this?

Answer 6

That essential services of flight instruments, navaids, and comms require little electrical current and can generally be maintained.