What was found
RDD FLIGHT NR 2309: NR 1 AC GEN FAIL LIGHT ILLUMINATED. CONDUCTED EMERGENCY CHECKLIST ITEMS. LIGHT REMAINED ILLUMINATED. NO LOAD OBSERVED ON NR 1 AC GEN. MAINTENANCE INTERROGATED CDS AND FOUND AC GEN CHIP DETECTOR FLAGGED AND PERFORMED THE ENGINE INSPECTION AFTER AC GEN FAIL IAW Q400 AMM TASK 05-53-00-210-819. NO BYPASS INDICATED ON THE MAIN OIL FILTER OR SACAVENGE OIL FILTER. REMOVED AND INSPECTED FOR DEBIRS IN THE SACAVAGE FILTER - NONE FOUND. INSTALLTED NEW FILTER. REMOVED AND EXAMINED THE MAIN OIL FILTER. NO DEBRIS FOUND. INSTALLED NEW ELEMENT. C/W PAR 5 C; OSC OUT. REMOVED AC CHIP DETECTOR DUE TO IT BEING FLAGGED. REMOVED FUZZ FROM DETECTOR. REMOVED AND REPLACED NR 1 AC GENERATOR. OPS CHECK GOOD. REMOVED