What safety procedure must be conducted before performing maintenance on aircraft?

• A. Check flight logs for previous issues
• B. Ensure the aircraft is secured and systems are powered down
• C. Notify the pilot of impending maintenance
• D. Inspect tools and equipment for damage

Answer: (B)

Before performing maintenance on an aircraft, it's critical to ensure that the aircraft is secured and that all systems are powered down. This safety procedure is necessary to protect personnel working on the aircraft and to prevent any accidental activation of systems that could lead to injury or damage. Securing the aircraft typically involves using chalks or other methods to keep it stationary, while powering down the systems ensures that no electrical or mechanical functions can inadvertently occur during maintenance. This precautionary approach safeguards both the maintenance crew and the integrity of the aircraft itself, allowing for a safe and efficient work environment.