PPL » Aircraft Tech Knowledge (A) » Electrical System - DC

12.26.2

Describe the types of systems which are typically electrically operated in a light aircraft.

12.26.4

Explain the function of the following components in a typical light aircraft electrical system:

(a) battery;

(b) alternator and generator;

(c) bus bar;

(d) voltage regulator, voltmeter, or over voltage light;

(e) ammeter;

(f) master switch and battery/alternator switches;

(g) fuses and circuit breakers. 

12.26.6

Explain the precautions to take during normal operation of the electrical system, including:

(a) avoiding continuous operation of high-power systems on the ground before start;

(b) starting with radios and other unnecessary equipment switched off;

(c) avoiding prolonged operation of the starter motor;

(d) releasing the starter once the engine is running;

(e) checking satisfactory operation of the system after start, and monitoring during flight;

(f) switching off ancillary equipment before shut-down;

(g) switching the battery master switch off before leaving the aircraft.

12.26.8

Identify the cockpit indications of the following electrical system malfunctions:

(a) excessive alternator/generator charge rate;

(b) lack of alternator/generator charge;

(c) blown fuse or popped circuit breaker.

12.26.10

State the actions available to the pilot to deal with:

(a) excessive alternator/generator charge rate;

(b) lack of alternator/generator charge;

(c) blown fuse or popped circuit breaker.