As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN CTCD DD ON ARRIVAL ORD WITH SITUATION THAT OCCURRED IN COCKPIT DURING FLIGHT. ONE OF THE BATTERIES IN FLASHLIGHT THAT CAPTAIN HAD IN FLIGHT BACK LEAKED (POPPED) AND RELEASED FUMES/SMOKE IN COCKPIT. F/O DONNED OXYGEN MASK AS CAPTAIN INCREASED OUTSIDE AIR FLOW TO CLEAR COCKPIT.