Arrigo's Fleet Service, Inc. v. Aetna Life & Casualty Co.

Plaintiff is in the business of repairing trailers of large cargo trucks. On April 1, 1971, such a unit, owned by North American Van Lines, was brought to plaintiff’s place of business. On the day before, the unit had been repaired for a broken hanger assembly connecting the axle to the body of the trailer, in Chicago, Illinois. The trailer was locked and the keys were in the possession of the driver. There were three locks on the trailer. An employee of the plaintiff began welding. Shortly thereafter, the driver left plaintiffs premises for coffee. Employees of plaintiff discovered smoke…