As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1 JFK-FLL, BLOWER FAN INOP BETWEEN 3K&4K. ON DESCENT ELECTRICAL BURNING SMELL W/GRINDING NOISE FROM AVIONICS BAY (LG STILL UP) ODOR BAD BUT NO VISIBLE FUMES. BLOWER PB IN OVRD FIXED ODOR AND NOISE. REMOVED AND REPLACED FAN BLOWER AS PER AMM 21-26-21-000-001A PERFORMED OPS TEST PER 21-26-00-710-001A TEST OK.