APU Lubrication System and Fuel Tank Pressure Quiz

If a malfunction renders one or both aircraft engine generators inoperative.

30,000 ft and below.

Check battery voltage, APU fire detector, left fire extinguisher bottle. Turn on main batteries, ensure minimum 22 volts, depress APU TEST pushbutton on FIRE TEST panel, and check CAS messages for malfunctions.

<p>In non-essential regime, it provides protective shutdowns to prevent damage to the APU, while in the essential regime, it blocks some protective shutdowns assuming starting the APU while airborne would only be necessary during a malfunction or failure.</p> Signup and view all the answers

<p>The ECU is powered from either the Right Essential DC bus or the Left Battery bus. If both are available, the ECU is powered by the bus with the highest voltage reading, providing redundancy in the event of an electrical malfunction.</p> Signup and view all the answers

<p>APU shuts down in 15 seconds</p> Signup and view all the answers

<p>95%</p> Signup and view all the answers

<p>APU shuts down</p> Signup and view all the answers

<p>To provide electrical power and pneumatic bleed air</p> Signup and view all the answers

<p>Non-Essential (Ground) Mode and Essential Mode (Flight)</p> Signup and view all the answers