As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD BUZZING SOUND COMING FROM CNETER CONSOLE. SOUND IS SIMILAR TO A FAN WITH BEARINGS THAT ARE FAILING. GROUNDED - YES. FOUND WEATHER RADAR R/T MOUNT BLOWER ASSY LOUDER THAN NORMAL. REPLACED WEATHER RADAR R/T MOUNT BLOWER ASSY PER B737-900 AMM 34-43-51 PG 401, BLOWER OPS CHECKS GOOD. W/R SYSTEM OPS TEST GOOD PER AMM TASK 34-43-710-802-001. ETOPS GROUND VERIFICATION SUCCESSFUL.