As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INVESTIGATED PASSENGER OXYGEN SYSTEM MASKS DEPLOYING WHEN SYSTEM ARMED. FOUND MANUAL CONTROL CABLE BUSHING MISSING AND PREVENTING MANUAL CONTROL CABLE FROM OPERATING VALVE THROUGH FULL TRAVEL. ALSO, FOUND WIRING TO PASSENGER OXYGEN SHUTOFF VALVE AND BAROMETRIC SWITCH NOT CONNECTED CORRECTLY. REWIRED BAROMETRIC SWITCH AND OXYGEN SHUTOFF VALVE AND CONTROL IAW MM. SYSTEM OPS CHECK OK. HAVE PREVIOUSLY NOTED SIMILAR PROBLEMS FOLLOWING SCHEDULED MAINT THIS AREA. (K)