As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ALT. WARNING HORN FAILED TO COME ON DURING ENTIRE LOSS OF PRESSURIZATION. FOUND CABIN LOW PRESSURE WARNING HORN SILENCE SWITCH FAILED OPEN AND BAD CONNECTION ON CABIN LOW PRESSURE SWITCH. REMOVED AND REPLACED SILENCE SWITCH AND REPAIRED CONNECTION SYSTEM. OPS CHECK GOOD. (X)