As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX- ON START OF FLIGHT IDLE DESCENT FROM 33,000, RECEIVED A GENERATOR 1 CAUTION LIGHT. COMPLIED WITH CHECKLIST, NORMAL GENERATOR OPERATION FOR THE REST OF THE FLIGHT. MAINTENANCE FOUND NO MDC FAULTS LISTED. LIGHT NOT ILLUMINATED. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. COULD NOT DUPLICATE PROBLEM.