As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TROUBLESHOOTING OF A PACK NOISE, FOUND THE CARGO ZONE CONDITIONED AIR SHUT-OFF VALVE IN THE CLOSED POSITION, THE VALVE REMAINS IN THE CLOSED POSITION. THE VALVE FAILED AN OPS CHECK IAW AMM 21-22-13-5. REMOVED AND REPLACED SHUT OFF VALVE IAW AMM 21-22-13-4. VALVE OPS CHECKED NORMAL IAW AMM 21-22-13-5.