As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:NA** SUPPLEMENTAL SDR** EXTREMELY LOUD SQUEEL FROM COOLING DUCTING IN E/E COMPARTMENT INFLIGHT SOUNDED LIKE A BEARING FAILURE FOLLOWED BY QUIET. TRANSFERRED TO NRC 244472AVIONIC FAN REMOVED IAW A300-600 MM CHPT 21-21-11-0401 PG1-3. VERIFED EFF PN IAW IPC 21-21-01-18J-100. OK TO INSTALL. INSTALLED AVIONIC FAN IAW A300-600 AMM CHPT 21-21-11-0403 PG 1-3. OPS CHECK GOOD IAW AMM 21-21-11-0401.