As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OXYGEN PRESSURE DECREASING. EICAS STATUS PARAMETERS DISPLAYED, OXY PRESS. CREW COMMENTS, AT TAKEOFF PRESS 1690, AT LDG 1530. RECONNECTED BOTH CREW OXYG EN MASKS AND LEAKED CHECKED GOOD.RESERVICED CREW OXYGEN PER AMM LEAKED CHECKED ALL FITTINGS AT CREW OXYGEN BOTTLE AND R EGULATOR AREA AND NO LEAKS FOUND.EICAS READING AND BOTTLE PRESSU RE ONLY 40 PSI DIFFERENCE.GOOD FOR SERVICE.