CHANTILLY, Va. (AP) _ A twin-engine charter plane reportedly operated by the CIA crashed and burst into flames, killing the pilot, during takeoff Wednesday at Washington- Dulles International Airport, officials said.

Metropolitan Washington Airport Authority spokesman Dave Hess said the propeller-driven aircraft went down at about 4 p.m. EDT at the end of the easternmost runway of the airport.

''It was about 400 to 500 feet above the runway,'' eyewitness Brian DePoorter said in a telephone interview with WUSA-TV. ''It came almost to a stop in the air. It stalled in a nose-up position and it sort of cartwheeled toward the left, dove straight down into the ground and immediately burst into flames.''

Federal Aviation Administration spokesman Pat Cariseo said the pilot was believed to be the only person on board. The victim's name was not immediately released, pending notification of kin.

Hess said the plane was owned by Fairways Corp., a charter service based at Washington's National Airport. It was en route to National when the crash occurred.

The Washington Post, citing unnamed aviation sources, said Fairways is operated by the CIA.

Bill Baker, a CIA spokesman, said the agency ''cannot confirm or deny any contractual or proprietary relationship'' with Fairways Corp.