Which action is used to cancel master warnings?

• A. Press the master warning/caution button
• B. Turn off the engine
• C. Select bypass
• D. Wait for automatic clearance

Answer: (A)

When a master warning occurs, you acknowledge the alert by pressing the master warning/caution button. This action stops the audible chime and extinguishes the red warning light, confirming you’ve seen the alert and are attending to the indicated issue. It’s important to note that acknowledging doesn’t fix the fault itself; it just clears the alert so you can focus on diagnosing and addressing the underlying problem. The other options aren’t the standard method: turning off the engine is unsafe and inappropriate for clearing warnings, bypass isn’t the general procedure for handling master warnings, and waiting for automatic clearance isn’t a controlled response.