As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE 'LEFT 10TH ARM OPEN' STATUS MESSAGE AND 'LEFT PACK OFF' STATUS MESSAGE.'RIGHT 10TH ARM OPEN' STATUS MESSAGE AND 'RIGHT PACK OFF' STATUS MESSAGE, RESULTING IN "CABIN ALT' WARNING AND PAX OXYGEN MASKS TO DROP. (FLT 6165) REPLACED L 10TH STAGE PRSOV, REPLACED L PRESS XDUCER AND BOTH PRESSURE SWITCHES. RIGHT FAULT WAS CAUSED BY LEFT SIDE FAILURE. REPLACED ALL CABIN OXYGEN GENERATORS.