As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON PRE-FLIGHT FOUND FORWARD "A" BELLY LOWER CARGO SMOKE DETECTOR INOPERATIVE. ENTERED ITEM ON DMI 17493 AS PER MEL 2G-10-1-0-1 CAT "B". REMOVED AND REPLACED SMOKE DETECTOR UNITS (SDUS) S/N 4566, 14470 & 13067 AS PER STC ST00746LA-D. OPERATIONAL CHECK GOOD. THIS CLEARS DMI 17493 (FORWARD A BELLY INOP LOWER CARGO SMOKE DETECTOR. SYSTEM CHECK NORMAL IAW STC # ST00746LA-D.