As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 15.000 FT OF ALTITUDE THE OVERHEAD (MASTER CAUTION ILLUMINATE AND THE "PASS OXY ON" LIGHT ILLUMINATE THE BLEED AIR CONTROL PANEL SWITCHES WEW IN NORMAL POSITION ALSO THE HIGH ALT LDG SWITCH WAS WHEN POSITION THE LAND ALTITUDE WITH 13.350 FT ALT THE OXY MASK DEPLOYED. REPLACED OXYGEN PRESSURE SWITCH, AND CHANGED FLOW CONTROL VALVE.