Podcast
Questions and Answers
What should be checked to confirm that the APU fire detection and extinguishing system is operative?
What should be checked to confirm that the APU fire detection and extinguishing system is operative?
The APU FIRE pb-sw should be activated to test the APU fire detection system.
The APU FIRE pb-sw should be activated to test the APU fire detection system.
True
What is the recommended time to set the APU START pb-sw to ON after the APU MASTER SW is turned ON?
What is the recommended time to set the APU START pb-sw to ON after the APU MASTER SW is turned ON?
3 minutes
In cold weather conditions, the flight crew may observe a bleed pressure up to _____ PSI.
In cold weather conditions, the flight crew may observe a bleed pressure up to _____ PSI.
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Match the following APU indicators with their descriptions:
Match the following APU indicators with their descriptions:
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What occurs if AC power is not available during the APU FIRE test?
What occurs if AC power is not available during the APU FIRE test?
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The APU SD page can only be displayed when AC power is available.
The APU SD page can only be displayed when AC power is available.
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What should be done to ensure the APU fuel feed line is sufficiently pressurized?
What should be done to ensure the APU fuel feed line is sufficiently pressurized?
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A flight crew should refer to _____ for information on APU starter limitations.
A flight crew should refer to _____ for information on APU starter limitations.
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Study Notes
APU Fire Test/APU Start
- Applicable to: ALL
- Ident.: PRO-NOR-SOP-04-C-00010902.0001001/23 NOV 21
- APU Fire Test: APU FIRE pb-sw, APU AGENT light, APU FIRE TEST pb
- Test Result: Verify APU fire detection and extinguishing system is operational; APU FIRE warning should appear if AC power is available; ECAM, CRC, MASTER WARN light, APU FIRE pb-sw will light red (may be partially lit if AC power isn't available), SQUIB light and DISCH light will be on.
APU Start
- APU MASTER SW pb-sw: If batteries are the only power source, APU pb will display on the ECAM control panel.
- APU START pb-sw: To enhance APU start performance, set APU START pb-sw to ON 3 minutes after flight crew activates APU MASTER SW pb-sw to ON. This ensures proper fuel feed pressurization.
- Cold Weather Considerations: Below approximately 10°C, a bleed pressure of up to 12 PSI might fluctuate on the APU SD and BLEED SD pages.
- Additional Information: For more information, see APU Controls and indicators/Overhead panel, LIM-APU APU Start, and LIM-APU APU Start/Shutdown during Refueling/Defueling.
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Description
This quiz covers the critical procedures for APU fire testing and start operations. Participants will explore the necessary steps to verify the operational status of fire detection and extinguishing systems as well as the optimal sequence for starting the APU. Emphasis is placed on safety protocols and performance considerations under various conditions.
