What was found
DIVERT FOR CREW OXYGEN LOSS. CREW O2 750 PSI, DECREASED TO 570 IN FLT. REMOVED AND REPLACED O2 REGULATOR FOR LEAKS PER MM 35-13-15-401. NO LEAKS NOTED. SEE ALSO LPS 7349112, 113, 116, PLUS 110. ATA 35 NUMEROUS WRITE-UPS SINCE APRIL 99, 9 MONTH LOOK BACK RECOMMENDATION. AIRCRAFT IS ON CRITICAL WATCH.