As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) UPON DESCENT, PILOT NOTICED AMP METER IN DISCHARGE POSITION. AFTER CHECKING BREAKERS, HE SWITCHED OFF MOST ELECTRICAL SWITCHES TO CONSERVE BATTERY POWER THROUGH LANDING. INVESTIGATION REVEALED ALTERNATOR AND CONTROLLER NOT FUNCTIONING. BOTH PARTS REPLACED AND AIRCRAFT RETURNED TO SERVICE BY AME.