Electrical Abnormal And Emergency Procedures

Question 1

During single generator operation if the voltage on the left generator bus is 24V, and the right generator bus is 28V, then _________.

Answer 1

The right current limiter has failed.

Question 2

What is the one reason you may see illumination of one of the AC BUS annunciations?

Answer 2

Inverter failure

Question 3

When the bus sense switch is tested during the electrical system check, 24V are observed on the centre bus. What would cause this?

Answer 3

The battery tie has not opened.

Question 4

During DUAL GENERATOR FAILURE, with a 40A electrical load, the battery will discharge in approximately ___________ minutes.

Answer 4

40 minutes

Question 5

Hall Effect Device (HED)

Answer 5

Set to 275 A, HEDs will open the associated bus tie if properly polarized current flow becomes excessive.

Question 6

What is the corrective action for a tripped circuit breaker?

Answer 6

Do not reset a tripped circuit breaker a second time.

Question 7

With loss of both inverters, why must power be set with fuel flow?

Answer 7

Prior to FL119 and including FL121, torque meters are AC

Question 8

What is the correct procedures for illumination of the #1 AC BUS warning annunciation?

Answer 8

AC circuit breaker - Check

No. 1 Inverter - Bus Transfer