The Electrical System

Question 0

What are the indications of a failed alternator?

Answer 0

The loss of an alternator is indicated by an annunciator light and a zero indication on the loadmeter.

Question 1

Describe the electrical system

Answer 1

14-volt electrical system with push-pull type circuit breakers.
12-volt, 35 amp hour battery
Two 70-amp engine driven alternators
Voltage regulators maintain constant 14-volt output from each alternator.
The plane can still operate on one alternator.

Question 2

Will the engines continue to run with the alternator and battery master switches turned off?

Answer 2

Yes, because ignition is provided through the use of engine driven magnetos which are independent of the aircrafts electrical system and each other.

Question 3

Describe the stall warning system.

Answer 3

The Seminole has two electric stall detectors.
They are on the left wing.
The inboard detector goes off at flaps 25* or 40*
The outboard detector goes off at flaps 0 or 10
There are two tabs to provide warning at varied angles of attack.
Deactivated on the ground by a squat switch on the left main gear.