The captain of the Southwest Airlines' Boeing 737-700 that crashed during landing at New York's LaGuardia airport on 22 July took over control when the aircraft was at an altitude of less than 400ft, according to an investigation update from the US National Transportation Safety Board.
Southwest flight 345 from Nashville, Tennessee to LaGuardia "proceeded on the approach when, at a point below 400ft, there was an exchange of control of the airplane and the captain became the flying pilot and made the landing," says the board's 6 August update.
The enroute phase of the flight was routine, but the aircraft circled for about 15min before landing due to weather conditions in the New York area, says the NTSB.
The first officer flew the aircraft and the captain monitored as the aircraft descended on an instrument landing system approach to runway 4, the board says.
The crew reportedly saw the airfield when they were 8-16km (4.32-8.64nm), and said the aircraft maintained the correct speed, course and glideslope until it was at between 200ft to 400ft over the ground.
The crew also reported having a tailwind of about 11kt (20km/h) at 1,000ft and an 11kt headwind on the runway.
Following the change in command, the aircraft touched the runway nose first, at a 3° downward pitch, while travelling at 133kt, the board says. The aircraft then travelled for 19s along 663m (2,175ft) of the runway.
The NTSB has not found and mechanical problems or malfunctions and a preliminary examination indicates the nose gear collapsed due to stress overload.
The NTSB also released details about the crew, but not their names.
The captain has worked for Southwest for nearly 13 years, including six years as captain, and has more than 12,000 total flight hours, including more than 7,000 as pilot-in-command, the board says.
The captain has 7,900 flight hours in 737s, including more than 2,600 as pilot-in-command.
The first officer has worked for Southwest for 18 months and has 5,200 total flight hours, including 4,000 as pilot-in-command and 1,100 hours in 737s. None of the first officer's 737 time was as pilot-in-command, says the NTSB.
The crash happened on the second flight of the crew's trip, which was the first trip on which the flight crew had worked together.
The captain had flown into LaGuardia twice before, including the accident flight, and both times he was pilot monitoring.
The first officer had flown into LaGuardia six times in 2013, the NTSB says.