A San Francisco real estate developer said yesterday he has an agreement with San Francisco Giants owner Bob Lurie to buy a majority interest in the team -- but only if the city would build the team a new downtown stadium.

"Between the two of us, we have a proposal that we think could work, but there are many pieces out of our control," said Peter Stocker. "If everything came to pass according to my best wishes, at some point in time I would expect to be able to acquire a controlling interest."

Stocker, who heads the Pacific Union Co., a major real estate developer, presented a plan this spring for a privately financed open-air stadium near Rincon Hill in a bid to keep Lurie from selling the team to interests in another city, possibly Washington. Those Lurie has talked to about a sale include Redskins owner Jack Kent Cooke . . .

Bard Air Corp., a freight charter company based in Detroit, has grounded the pilot and co-pilot of a Lear jet that roared over Tiger Stadium en route to City Airport, officials say. The crew members were grounded pending an investigation by the Federal Aviation Administration into the incident, which disrupted Tuesday night's game between the Tigers and Kansas City Royals.