Columbia's Ground Echo: The Space Shuttle's First Flight Damaged Tiles Before Liftoff
NASA’s 1981 Columbia mission damaged 16 heat-shield tiles and 148 more within seconds of ignition—not from engine failure but from the shockwave reflecting off the launch pad; to prevent recurrence, NASA refined the Sound Suppression Water System, pouring hundreds of thousands of gallons under the pad to absorb acoustic energy, a practice that continues for crewed launches, with two high-stress windows at ignition overpressure and during max Q as the vehicle climbs.