Calvin Davison, 81, a lawyer who specialized in aviation law, died April 25 at Sibley Memorial Hospital in the District of complications from Parkinson’s disease. He lived in Washington.

His wife, Carole Davison, confirmed his death.

Mr. Davison retired in 1997 from the firm of Crowell & Moring, where he was senior partner. He had been a founder of the firm in 1979.

He represented several airlines, including Pan American, Eastern, Delta, Continental, Alaska Airlines and Western Airlines, in rate and route litigation and was general counsel to the Regional Airline Association.

Calvin Davison was born in Cincinnati. He graduated in 1953 from Miami University in Oxford, Ohio, where he was elected to the Phi Beta Kappa honor society. After serving in the Navy, he graduated from Harvard law school in 1959.

He moved to Washington in 1959 and practiced law with Jones, Day and its predecessor firms before founding Crowell & Moring.

Mr. Davison did pro bono legal work for the Georgetown Citizens Association on matters relating to zoning and land use.

For 30 years, he had a vacation home in Rehoboth Beach, Del.

Survivors include his wife of 42 years, Carole Sawyer Davison of Washington; a son, Douglas S. Davison, who was a producer of the Oscar-winning movie “The Departed,” of Los Angeles; and a sister.

— Bart Barnes