What was found
(CAN) CREW OXYGEN PRESSURE DROPPING, 70 PSI DROPPING TO 50 PSI. RADIO PATCH SETUP WITH MOC. UNABLE TO CONFIRM IF INDICATION FAULT OR LOW PRESSURE. FLIGHT DIVERTING FOR SUPPORT. RESOLUTION REMOVED AND REPLACED CREW O2 BOTTLE IAW 35-11-41-000-001-A AND AMM 35-11-41-400-001-A, NO LEAKS EVIDENT. PER TSM 35-10-00-810-814-A OVERBOARD DISCHARGE INDICATOR YELLOW. XMTR/PRESS REG. - OXY REPLACED IAW AMM 35-13-15-000-001-A AND AMM 35-13-15-400-001-A, NO LEAKS EVIDENT. (TC# 20190311019)