What was found
(CAN) NOT AN SDR - A/C 708, AUGUST 08/2000, YYZ, LOG SEQUENCE 0204503. ADVANCING THROTTLES FOR TAKEOFF, (APPROXIMATELY 5 TO 10 KNOTS) LARGE BANG WAS HEARD FROM NR 1 ENGINE. TAKEOFF WAS ABANDONED. ENGINE WAS SHUTDOWN, PARAMETERS APPEARED NORMAL. A PASSENGER REPORTED, HE HAD SEEN SOMETHING GOING INTO ENGINE. MAINTENANCE FOUND RESIDUE OF A PLASTIC BAG IN NR 1 ENGINE. FOD INSPECTION COMPLETED AS PER FLYAWAY MANUAL 2-02-05.01, NO FAULTS FOUND. NR 1 ENGINE RUNUP COMPLETED AS PER RUNUP MANUAL 5-2-6, CHECKED OK. NR 1 ENGINE BOROSCOPE WAS COMPLETED WITH 25 HOURS OF FLIGHT AS PER WORK CARD 1013-1 ITEM 3A, NO EVIDENCE OF DAMAGE NOTED.