2016 PC Guide - Electrical Flashcards Preview

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Flashcards in 2016 PC Guide - Electrical Deck (4)
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1
Q

You are originating a NextGen aircraft with no external power available. During your pre-flight duties, you start the APU/ You place the APU switch to START momentarily, and then release it to the ON position. As you do this the BAT DISCHARGE light illuminates. Is this considered normal?

A

Yes.

The amber BAT DISCHARGE light may illuminate during an APU start with no AC power on the aircraft. This is considered normal. With AC power available, the APU will start off the Transfer Bus #1.

2
Q

You are in MDW on a hot day in your heavy NG aircraft. A bleeds-off takeoff is required. After engine start, you are distracted by passenger issues and forget to close the engine generator switches, leaving both transfer buses powered by the APU generator. All checklists are completed without noticing the error. At 10,000 feet, you turn the APU off. What happens to your electrical system.

A

The engine generators are automatically connected to their related transfer busses by the automatic generator online feature. This action occurs only once in flight, and only in the situation described above (APU fails or is turned off once airborne). If the error is caught before the APU is turned off, the engine generators may still be selected manually.

3
Q

You are enroute to OAK from SEA in the Classic. As you begin your descent for arrival into OAK, you get a master caution light ELEC system annunciator. You notice it is the No 1 HIGH OIL TEMP light. Will the generator drive disconnect automatically.

A

No.

This automatic disconnect feature, due to high oil temperature, is only available in the NextGen aircraft.

4
Q

What is the minimum battery voltage to start the APU?

A

None

No minimum voltage is required for an APU start.