the disintegration of the No. 6 bearing in the No. 2 engine which resulted in an aborted takeoff. In addition, the malfunction of the slide in the right forward service door was the result of a faulty seal in the inflation system. The inflation gauge had not been checked that day due to confusion resulting from a change in the operations manual. The change in the language made it unclear as to whose responsibility it was to check the inflation gauge. The operator did not verify that the change was being properly implemented after it had been made effective.