Title: Describe the aircraft electrical system.
Course: Aircraft Pilot Training I (20053-I) > Section: Examining Aircraft Instruments, Components, Systems, and Performance

Description should include the following:

- Most aircraft are equipped with either a 14- or a 28-volt direct current (DC) electrical system.
- A basic aircraft electrical system consists of the following components:
  - Alternator/generator
  - Battery
  - Master/battery switch
  - Alternator/generator switch
  - Bus bar, fuses, and circuit breakers
  - Voltage regulator
  - Ammeter/loadmeter
  - Associated electrical wiring

- Engine-driven alternators or generators supply electric current to the electrical system. They also maintain a sufficient electrical charge in the battery.
- Electrical energy stored in a battery provides a source of electrical power for starting the engine and a limited supply of electrical power for use in the event the alternator or generator fails.

PLT107