As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: CLIMBING THROUGH 10,000 FEET NOTICED AIRCRAFT CABIN ALTITUDE WAS CLIMBING. ALSO HEARD EXTREMELY LOUD NOISE COMING FROM CO PILOT WINDOW. ACCOMPLISHED PRESSURIZATION CHECK PER AMM 21-31-00. NO LOUD NOISE NOTED IN THE COCKPIT. PRESSURIZATION TEST OK.