As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, CRUISE, & DESCENT. A VERY NOTICEABLE LOUD NOISE, LIKE BRAKE ACCUMULATOR PUMP CYCLING VERY FREQUENTLY. NO ANNUCIATOR NOTED. FOUND A CLAMP ON THE WINDSHIELD ANTI-ICE BLEED AIR SUPPLY WYE DUCT AT FWD PRESSURE BULKHEAD IN COCKPIT LOOSE. TIGHTENED CLAMP AND RAN ACFT AND NOISE WENT AWAY.