As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE WE TRIED TO PURGE THE WATER SYSTEM B ON N650ER SMOKE APPEAR ON THE CABIN, RIGHT AFTER THE AIRCRAFT WAS POWER DOWN. INITIAL INVESTIGATION CARRIED OUT FOUND R/H MAIN TRU EXTREMELY HOT AND COOLING FAN NOT WORKING. SQUAWK 8.52 ON W/O SC21602 RAISED.