What was found
(CAN) INTERMITTENT SMOKE DETECTORS ON ONLY WHEN APU PROVIDING AIR CONDITIONING ON GROUND, NOTICEABLE ODORS IN CABIN. OK WITH GROUND COOLING FAN OR ENGINE AIR USED. APU REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) INTERMITTENT SMOKE DETECTORS ON ONLY WHEN APU PROVIDING AIR CONDITIONING ON GROUND, NOTICEABLE ODORS IN CABIN. OK WITH GROUND COOLING FAN OR ENGINE AIR USED. APU REPLACED.