What was found
(CAN) APPLIED T/O POWER DEPARTING AT APPROXIMATELY 60KTS-70KTS THERE WAS VISIBLE WHITE SMOKE FROM FROM GASPERS, CREW REJECTED T/O. SMOKE CLEARED AFTER THE REJECT. ACFT WAS MET AND ESCORTED BACK TO GATE WITHOUT FURTHER INCIDENT. LT PACK REMOVED INSPECTED HEAT EXCHANGERS NO FAULTS, POSSIBLE LT ACM AT FAULT. NR 1 LT ACM CHANGED IAW AMM 21-50-00. LEAK CHECK AND FUNCTIONAL TEST CARRIED OUT. ENGINE RUN TO 82 PERCENT N1. NO OR MINIMAL RESIDUAL ODOR.