What was found
#1 AC GEN CAUTION LILGHT ILLUMINATED AFTER APPLICATION OF TAKEOFF POWER. TAKEOFF ABORTED AT 60 KNOTS. REMOVED FROM SERVICE. FOUND EPCU FAULT CODE 27. INTERROGATED CDS FOR CHIP DETECTOR FAULTS. NO FAULTS FOUND. REMOVED AND REPLACED #1 AC GEN IAW Q400 MTC 6242101. PERFORMED LEAK CHECK AND OPS TEST. BOTH CHECK GOOD. #1 AC GEN LIGHT REMAINED EXTINGUISHED. INTERROGATED EPCU FOR FAULTS. NO FAULTS FOUND. NO FURTHER DEFECTS NOTED. INTERROGATED CDS FOR FAULTS.NO FAULTS FOUND. RETURNED TO SERVICE.