What was found
OBSERVER'S FLEXIBLE OXYGEN LINE TO THE REGULATOR RUPTURED INFLIGHT. CREW INITIATED DESCENT TO 21,000 FEET. REPLACED OBSERVER'S FLEXIBLE OXYGEN LINE TO THE REGULATOR.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
OBSERVER'S FLEXIBLE OXYGEN LINE TO THE REGULATOR RUPTURED INFLIGHT. CREW INITIATED DESCENT TO 21,000 FEET. REPLACED OBSERVER'S FLEXIBLE OXYGEN LINE TO THE REGULATOR.