Which action is performed to maintain airflow in the APU air intake during maintenance?

Which action is performed to maintain airflow in the APU air intake during maintenance?

• A. Inspect and clean or replace air filters; remove blockages; ensure louvers/opening mechanisms function
• B. Replace fuel pump
• C. Repaint
• D. Disconnect wiring

Answer: (A)

Maintaining airflow in the APU intake hinges on keeping the air path clean and the intake doors working. The best maintenance action is to inspect and clean or replace the air filters, remove any blockages, and verify that the louvers or opening mechanisms function properly. Clean filters and clear paths ensure the APU gets enough clean air at all operating speeds, which prevents restricted flow that can cause higher temperatures, reduced performance, or compressor issues. Ensuring the louvers open and close as intended lets the system regulate airflow for different conditions, protecting the APU from overheating or inadequate cooling. Fuel pumps, repainting, or disconnecting wiring don’t directly affect the airflow entering the APU, so they don’t address the maintenance need for the intake path.

Maintaining airflow in the APU intake hinges on keeping the air path clean and the intake doors working. The best maintenance action is to inspect and clean or replace the air filters, remove any blockages, and verify that the louvers or opening mechanisms function properly. Clean filters and clear paths ensure the APU gets enough clean air at all operating speeds, which prevents restricted flow that can cause higher temperatures, reduced performance, or compressor issues. Ensuring the louvers open and close as intended lets the system regulate airflow for different conditions, protecting the APU from overheating or inadequate cooling.

Fuel pumps, repainting, or disconnecting wiring don’t directly affect the airflow entering the APU, so they don’t address the maintenance need for the intake path.