As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOISE IN CABIN. REPLACED-: FLIGHT DECK ZONE TEMPERATURE SELECTOR & ZONE TEMPERATURE CONTROLLER IAW MM. REPLACED FLIGHT DECK ZONE TEMPERATURE SENSOR IAW MM FLT DECK NOISE CHECKED GOOD. DUE TO HISTORY OF LOUD COCKPIT NOISES AND UNCONTROLLABLE COCKPIT TEMPERATURES. NEED TO REPLACE FLT COMP TRIM AIR VLV. REPLACED FLT COMP TRIM AIR VALVE (P/N 398786-5 - DASH# 350 - POSIT 1). OPS AND LEAK CK OK.