As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. SMOKE REST UPPER DR4 NON-NORMAL CHECK LIST POPPED UP IN FLIGHT FOLLOWED BY CARGO HEAT BULK WARNING. ACCOMPLISHED OVERHEAD FLIGHT ATTENDANT REST SMOKE DETECTION OPERATIONAL TEST PER MM 26-14-20 IN ADDITION TO GROUND TEST CARGO HEAT SYSTEM. TEST PASSED.