What was found
COCKPIT FAR TOO MUCH NOISE WITH PACKS ON. CANNOT HEAR CHECKLIST OR ATC GROUND AND IN AIR. REPLACED AIR RECIRCULATION FAN CONTROL VALVE, OPS CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
COCKPIT FAR TOO MUCH NOISE WITH PACKS ON. CANNOT HEAR CHECKLIST OR ATC GROUND AND IN AIR. REPLACED AIR RECIRCULATION FAN CONTROL VALVE, OPS CHECK GOOD.