It was a crisp, clear morning at Sunset Airfield, a small but bustling general aviation airport nestled between rolling hills. The sun was just beginning to peek over the horizon, casting a golden glow over the tarmac and the aircraft parked or taxiing on it. Among them was a sleek, silver single-engine plane, a Pitts Special S-2S, bearing the registration number N545MC. This was no ordinary plane; it was known for its agility and was a favorite among aerobatic enthusiasts.

Alex's eyes widened. "Let's check the tire."

On this particular morning, Jack Harris, a seasoned pilot with thousands of hours of flight experience, was preparing for a special flight. Jack had been an active member of the aerobatic community for years, known for pushing the limits of his aircraft and himself. Today was no different; he planned to perform a series of aerobatic maneuvers for a promotional video.

The runway lights flickered to life as Jack lined up for takeoff. He advanced the throttle to full power, and the Pitts Special began to roll down the runway, picking up speed rapidly. The engine roared, and the aircraft vibrated with the force of acceleration. Just as Jack was about to rotate the aircraft for takeoff, he noticed something odd - a slight wobble, almost imperceptible, but there.

"This could have been an 'active takeoff crack'," Jack mused, referring to the critical nature of the crack and how it could have acted during the takeoff roll.