During External Walk around inspection, tactile checks are used to determine what?

• A. Wing free from frost, ice, snow or slush
• B. Tire condition and tread depth
• C. Fuel quantity and balance
• D. Cabin pressure integrity

Answer: (A)

Tactile checks during an external walk-around focus on feeling the wing surface to ensure it is free of frost, ice, snow or slush. Frost or ice on the wing disrupts the smooth airflow, which can drastically reduce lift and raise the stall speed, making takeoff unsafe. By running a hand along the leading edge and wing surface, you can detect any contamination that isn’t visible. The other items—tire condition and tread depth, fuel quantity, and cabin pressure integrity—are determined by visual inspection or separate gauges and system tests, not by tactile checks on the wing.