What was found
OBSERVER'S OXYGEN MASK FAILED TEST. HARNESS EITHER STAYS INFLATED OR STAYS DEFLATED. BUT IT WON'T BOTH. REMOVED & REPLACED THE OXYGEN MASK IAW AMM 35-11-12. OPS TEST AND LEAK CHECKED GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
OBSERVER'S OXYGEN MASK FAILED TEST. HARNESS EITHER STAYS INFLATED OR STAYS DEFLATED. BUT IT WON'T BOTH. REMOVED & REPLACED THE OXYGEN MASK IAW AMM 35-11-12. OPS TEST AND LEAK CHECKED GOOD.