As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX OXY MASKS DEPLOYED IN CLIMB AT FL 390. FOUND S119 CABIN ALTITUDE PRESSURE SWITCH AT FAULT MAKING CONTACT AT 6,300 FEET CABIN ALTITUDE INSTEAD OF 14,000 FEET CABIN ALTITUDE. REPLACED SWITCH SYSTEM CHECKS GOOD PER M/M. REPLACED USED OXY GENERATORS AND STOWED MASKS.