Pre-Flight Tip: Checking Control Surfaces

Control surface checks are a critical part of every preflight, yet pilots often rush through them or miss key elements. A methodical approach ensures you catch problems before they become emergencies.

The Proper Sequence

Start at the cockpit. Move each control through its full range while watching the corresponding surface outside. Ailerons, elevator, rudder—move each deliberately, not just a quick wiggle.

What You’re Looking For

Watch for full and free movement without binding or stiffness. Controls should move smoothly to their stops. Listen for unusual sounds—grinding, scraping, or clicking that wasn’t there before.

Check for proper direction: stick left moves left aileron up, right aileron down. Forward stick moves elevator down. Left rudder pedal moves rudder left. Any reversal indicates a serious rigging problem.

Outside Inspection

During the walk-around, examine each surface closely:

• Check hinge points for security and proper lubrication
• Look for dents, tears, or surface damage
• Verify balance weights are secure
• Ensure control stops are properly set
• Remove any debris or ice accumulation

Trim Tab Check

Don’t forget the trim tabs. Verify they move through their full range and respond correctly to cockpit inputs. A jammed or reversed trim tab can make the aircraft unflyable.

The Two-Person Check

When possible, have someone move the controls while you watch outside, then switch. This catches binding or disconnection issues that might not be obvious with one-person checking.

Take your time. The few extra minutes you spend now could prevent a control failure in flight. There are no shortcuts to a proper preflight.