What was found
AT 17,000 FT OXYGEN CWP CAME ON 02 GAUGE READ 800 PSI, DESCENT WAS INITIATED INTO MEM, AND 02 LEVEL CONTINUED TO DROP. MAINTENANCE REMOVED AND REPLACED TEE FITTING P/N 716955, AND CAPILLARY LINES P/N 803197-12 AND P/N 803197-47, LEAK AND OPS CHECK GOOD. A/C OK FOR CONTINUED SERVICE IAW SF3 AMM 35-11-00.