What was found
ON RUNWAY WHILE RUNNING UP ENGINES TO 40% FOR TAKEOFF, BLOWER FAULT LIGHT ILLUMINATED. REJECTED TAKEOFF AND APPLIED PDM. MEL 21-23-01-01-A 'VENT BLOWER FAN INOPERABLE'. RELEASED FOR SERVICE, PER MEL: 21-XX-XX-XX CAT: C "MEL 21-XX-XX-XX: VENT BLOWER FAN-INOPERABLE, REFER TO MEL 21-XX-XX-XX FOR OPERATIONS PROCEDURES FOR CANCELLATION OF BLOWER FAULT LIGHT PRIOR TO DEPARTURE. FOR GROUND OPERATION OF AVIONICS, CONDITIONED AIR MUST BE AVAILABLE AND USED". REMOVED AND REPLACED BLOWER FAN 67HQ, IAW M/M 21-21-11-04-99.