As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON PRE-FLIGHT INSPECTION, OXYGEN PRESSURE NOTED AT 617 PSI. ALL FLT DECK MASKS OPS CHECK NOT LEAKING. SUSPECT OXYGEN SYSTEM LEAK, OUTSIDE AIR TEMP 01 C.(<P>REMOVED AND REPLACED CREW O2 BOTTLE IAW B767 AMM 12-15-08 & GMM 3.28.2. NO LEAKS NOTED ON ENTIRE SYSTEM. </P>)