A Baldwin Borough man yesterday sued a trucking company and the trucker who drove the vehicle that slammed into his motorcycle in June at the Armstrong Tunnels.

"We've believed from the beginning that [Mark McGreevy] was not at fault," said John P. Gismondi, attorney for McGreevy, who was critically burned and lost a leg in the collision.

McGreevy, 44, still is in serious condition in the burn unit of Mercy Hospital, where he was taken after the June 3 accident.

He had ridden from Second Avenue through the Armstrong Tunnels and was in traffic at a stoplight at the Forbes Avenue end, Uptown, when he was struck from behind by a 15-ton dump truck driven by Jack Fatta, 65, of Clarksburg, Indiana County.

McGreevy was trapped under the truck and much of his lower body was burned after gasoline from his bike ignited.

Several witnesses assisted, extinguishing the fire before paramedics arrived. Special air bags were used to lift the truck so that McGreevy could be extricated.

Gismondi said one of McGreevy's legs had to be amputated and he suffered burns on one arm as well.

The lawsuit, filed yesterday in Allegheny County Common Pleas Court, also names as defendants Fatta's employer, Clarksburg Trucking Co., and the vehicle owner, Taylor Services Inc. in Blairsville.

Attorneys for the three defendants could not be reached yesterday.

"Mark has a long road of recovery ahead of him, and it is in his best interest that we get the legal claim on record so that we are not losing further time while he recovers," Gismondi said.

Pittsburgh police still are investigating the accident. No charges had been filed as of yesterday.

McGreevy, a father of two, is the son and grandson of Pittsburgh police officers.

He still is concerned about whether he can ever return to work as a relief route man at the Pittsburgh Post-Gazette's Bethel Park and Bridgeville distribution centers, Gismondi said.

A benefit motorcycle run was held recently to help McGreevy defray medical expenses, the lawyer said.