NEW YORK (AP) -- Investigators are hoping that navigation equipment and engine instruments aboard a helicopter might provide clues about why it crashed into New York's East River, killing one passenger and seriously hurting three others.
A member of the National Transportation Safety Board, Mark Rosekind, spoke at a briefing Wednesday, a day after the crash.
Rosekind said the privately operated Bell 206 likely did not have a flight data recorder, or "black box." But engine monitors and Global Positioning System navigation equipment may have stored useful information, he said. Investigators had also collected video of the crash.
Experts were studying the weather at the time of the flight, Rosekind said.
"One of the areas we're looking at are the winds," he said.
A weather reporting station at nearby LaGuardia Airport had reported gusts of up to 20 mph on Tuesday afternoon. Winds can sometimes be rougher along the river because of turbulence caused by tall buildings and bridges.
Rosekind said a piece of one of the helicopter's main rotor blades was missing, but it's not clear whether it broke before or after it crashed.
The pilot, Paul Dudley, has undergone an initial interview. Rosekind said Dudley had more than 2,200 hours of flight experience, including 500 hours in Bell 206s.
The Bell 206 that Dudley was flying was built in 1976. Rosekind said investigators would review its maintenance records as part of the investigation.
Emergency crews arrived within seconds of Tuesday's crash to find the helicopter upside-down in the murky water with just its skids showing on the surface. The pilot and three passengers were bobbing, and witnesses reported a man diving down, possibly in an attempt to rescue the remaining passenger.
New York Police Department divers pulled Sonia Marra, 40, from the water about 90 minutes after the helicopter went down at about 3:22 p.m. She was pronounced dead at the scene.
Meanwhile, a portrait emerged of the pilot as an expert flier who once landed a plane in a field near Coney Island after its engine failed. Dudley owns Linden Airport Services, the company that manages the Linden, N.J., municipal airport under a 20-year contract with the city, Linden Mayor Richard Gerbounka said.
"He's an accomplished pilot," Gerbounka said.
Pilot Owen Kanzler, who said he has known Dudley for at least 20 years, said he saw Dudley's helicopter take off from the airport around 3 p.m.
"As long as I've known Paul, he's owned and flown helicopters," he said. "He's a nice, outgoing man who does a fine job running the airport."
The passengers were friends of Dudley's family and were visiting New York to celebrate the birthdays of Marra and her stepfather Paul Nicholson, 71. He was on the chopper along with his wife Harriet, 60; and a friend of Marra's, Helen Tamaki, 43. The Nicholsons are British but live in Portugal; Marra and Tamaki, a citizen of New Zealand, lived in Sydney, Australia. The group had planned to do some sightseeing and then go to dinner in Linden, police said.
The pilot's wife, Sunhe Dudley, told The Associated Press that she had spoken to her husband briefly after the crash.
"These were actually very dear friends of ours that were in the helicopter," she said.
Marra had worked at Galluzzo's fruit and vegetable market in the Sydney suburb of Glebe for the past three months, said worker Joe Galluzzo. Marra was thrilled when Tamaki surprised her with the trip to New York as a 40th birthday present, Galluzzo said.
Marra had not seen her family in years, and was planning to meet up with them at the top of the Empire State Building as soon as she and Tamaki arrived in New York, Galluzzo said.
"Loved by the customers, fantastic personality - very bubbly," Galluzzo said of Marra. "She couldn't do enough for us. She was just a great, great person."
Mayor Michael Bloomberg said Dudley apparently reported problems in the helicopter and tried to turn around but instead crashed into the water.
The pilot's lawyer told Newsday that Dudley was "in shock and full of regret for what happened."
Robert Hantman said Dudley told him that the helicopter went through a "full maintenance check" by a "reputable mechanic" before the flight.
The National Transportation Safety Board was at the scene Tuesday, and crews pulled the wreckage from the water about four hours after it went down. The chopper was taken to the police department's Floyd Bennett Field in Brooklyn. The airport in Linden, about 17 miles from the 34th Street heliport, was locked down briefly pending the arrival of Federal Aviation Administration and NTSB investigators.
The crash triggered a massive rescue effort, with a dozen boats and divers going down into the cold, gray water. Police officers doing a counterterrorism drill nearby jumped into the water wearing their uniforms, and without any rescue equipment they pulled the passengers to shore. Fire department rescue paramedics revived Harriet Nicholson and Tamaki, who were in critical condition; Paul Nicholson was stable. All were hospitalized. Dudley swam to shore and was uninjured.
"The pilot did indicate that there was somebody still in the helicopter," Lt. Larry Serras said. "By the time we swam to the helicopter it was completely submerged."
Speaking on the CBS' "The Early Show" on Wednesday, Serras said the current "was a lot more difficult than I thought it was going to be. The swim was a lot further than it first appeared. If we didn't have some flotation devices I think things could have been a lot worse."
Because of the limited amount of flotation devices, "We tried to stay together so we wouldn't lose any of the rescuers," added Serras, who appeared on the show with Officer Jason Gregory, one of the divers who brought Marra's body to the surface.
Gregory said that the helicopter was upside down in the sediment.
He said he jumped in the water with his partner and "the wreckage was right there and the victim was inside."
The Linden airport is a popular base and refueling stop for helicopters and private planes operating in New York. Charter companies, news helicopter and private pilots use the airport.
In November 2006, Dudley landed a Cessna 172 light plane in a park near Coney Island in Brooklyn after the engine failed. No one was hurt during the emergency landing, and the plane was taken back to Linden after mechanics removed the wings.
The Bell 206 Jet Ranger is one of the world's most popular helicopter models and was first flown in January 1966. They are light and highly maneuverable, making them popular with television stations and air taxi companies. A new one costs between $700,000 and $1.2 million.
The East River has been particularly tricky for pilots because of its many bridges and its proximity to LaGuardia, one of the nation's busiest airports. In 2006, New York Yankees pitcher Cory Lidle died when the Cirrus light plane he was flying crashed into a residential building while trying to make a turn over the river.
In January 2009, an Airbus 320 airliner landed in the Hudson after hitting birds and losing both engines shortly after taking off from LaGuardia. The flight, U.S. Airways Flight 1549, became known as the Miracle on the Hudson plane.
But later that year, another crash had a much darker ending: a small plane collided with a helicopter over the Hudson River, on the other side of Manhattan, killing nine people, including five Italian tourists. A government safety panel found that an air traffic controller who was on a personal phone call had contributed to the accident.
The FAA changed its rules for aircraft flying over New York City's rivers after that collision. Pilots must call out their positions on the radio and obey a 161 mph speed limit. Before the changes, such radio calls were optional.
Dudley filed a lawsuit against a proposed heliport in Kearny, N.J., after that deadly collision, citing safety concerns. He argued that additional planes flying over Jersey City, N.J., on their way to New York would create dangerous air traffic, the Newark Star-Ledger reported at the time.
Witnesses said Tuesday's crash happened quickly, with the helicopter sputtering and appearing to be in some type of mechanical distress. Carlos Acevedo, of Puerto Rico, was with his wife at a nearby park area when they saw the helicopter go down.
"It sank fast," he said. "In seconds. Like the water was sucking it in."
Associated Press writers, Colleen Long, Jennifer Peltz, Deepti Hajela, Karen Zraick, Anita Snow, Cristian Salazar and AP news researcher Barbara Sambriski in New York, Samantha Henry in Linden, N.J., Frank Eltman in Southampton, N.Y., and Rod McGuirk and Kristen Gelineau in Australia contributed to this report.