Approach and Runway Alignment
The approach briefing, radios, instruments, and speed bugs were set up for a planned landing on runway 17R. However, the first officer, who was flying, inadvertently aligned the airplane with runway 17L. The flight was subsequently cleared to land on that runway.
Warnings and Descent
At 500 feet above ground level (AGL), the glideslope aural warning sounded. As the airplane descended, at 100 feet AGL, the ground proximity warning system's sink rate warning activated. In response, the first officer added power.
Hard Landing
At 50 feet AGL and over the runway threshold, airspeed deteriorated. The first officer applied additional power, and the captain added maximum thrust and forward control yoke pressure. According to the crew, "a hard landing was made."
Wind Conditions
A review of control tower tapes revealed that winds varied from 180 to 200 degrees and between 10 and 27 knots. Moments before the flight landed, another landing airplane reported a 10-knot loss of airspeed at 100 feet.
Damage
The airplane sustained damage to the pressure vessel and structural stringers.