Thurman Munson left an estate of $4.9 million but debts approaching $4 million according to documents filed in probate court at Canton, Ohio. Lloyd's of London insurance underwriters and the New York Yankee catcher's family are headed for a courtroom battle over coverage. The Cessna plane in which Munson was killed was listed as a $1.2 million item -- in which Munson's actual investment was $120,000 -- and as worth $1 in salvage. The baseball star was heavily into real estate holdings, and obligations. . .

Services are scheduled Thursday in St. Louis for Earl Weaver Sr., father of the Oriole manager. Death came Sunday at 78, at Earl Jr's home in Miami. The elder Weaver coached Khoury League teams for years, including a three-time championship squad on which his son played. Mr. Weaver ran a dry cleaner's patronized for many years by basebal's Cardinals and Browns. Since suffering a stroke, he and his wife wintered with Earl Jr. in Florida. . .

Dean Landolt, a Maryland Terrapin linebacker 1967-69, died Sunday in George Washington U. Hospital; recurrent hepatitis. His uncle, Gonzage High's Coach Joe Kozik, wants to make sure friends know they may call at Hines-Rinaldi Funeral home or attend masses at St. Camillus in Silver Spring before burial Thursday.

Good old Hollywood Henderson has had his meeting with Coach Dick Nolan and the word from the New Orleans coach to the former Dallas linebacker's urging to deal the Cowboys a No. 1 draft choice for him is: No."I know that he wants to play," Nolan says, "and he's a fine athlete, but right now a No. 1 is out of the question." So if the Cowboys don't lower that demand, Henderson stays in limbo . . .