As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT ARRIVED AT ST. HUBERT (YHU) PILOTS SHUT DOWN ENGINES AND APU, HAD NO POWER ON AIRCRAFT WITH BATTERY SWITCH ON BATTERY. PILOT TOOK SWITCH AND TOGGLED IT TO OFF AND THEN TO EMERGENCY POWER AND STILL NO POWER ON AIRCRAFT. UNABLE TO PUT BATTERY ON LINE.