As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB ABOVE FL 300 LOUD GRINDING NOISE COMING FROM RIGHT SIDE OF AVIONIC BAY-R&R EXTRACT FAN PUSHBUTTON SWITCH IAW AMM 20-45-11. R&R EXTRACT FAN (18-HQ) IAW AMM 21-26-51. PERFORMED AVEC TEST IAW AMM 21-26-00. TEST PASSES. NO DEFECTS NOTED. A/C OK FOR CONTINUED SERVICE.