FORT WORTH, Texas (AP) _ American Airlines and the Allied Pilots Association reached agreement Friday on a new contract for the airline's 6,000 pilots, officials said.

The end to the 11-month contract talks was announced Friday by APA President Fred Vogel and Charles A. Pasciuto, vice president for employee relations of the nation's third-largest airline.

''The agreement contains many new and innovative concepts. As a result, details are being withheld while representatives of the union and the company complete the complex work of transforming the agreement into specific contract language,'' said airline spokesman John Hotard.

The contract between American and the pilot's union does not have to be ratified by rank-and-file union members, said Hotard. American and the pilots union had been meeting since April 30, 1986.

Under the Railway Labor Act, contracts between airlines and their unions do not expire. Instead, Hotard said, they become amendable.

Both the airline and the union earlier this month requested a federal mediator from the National Mediation Board.

The company is pleased that both sides have been able to reach an agreement, said Hotard. He said there is no indication when the final pact will be completed.

Earlier this month, American filed a lawsuit in Fort Worth federal court against the pilots' union, alleging a work slowdown and other tactics harmful to the airline's operation.

American is also in negotiations with its flight attendants' union.