What was found
CAPTS O2 MASK NOT WORKING PROPERLY.(<P>SWAPPED CAPTAINS O2 MASK WITH # 1 SUPERNUMARY O2 MASK IAW AMM 35-11-51. CAPT MASK OPS GOOD. # 1 SUPERNUMARY O2 MASK TRANSFERRED TO MDDR 160411 IAW MEL 36-11-03-02A, CAT C, DUE DATE 06FEB22.</P> / <P>CVG MX- 29JAN. LP 1502099, ITEM M10: REMOVED AND REPLACED #1 SUPERNUMERARY OXIGEN MASK IAW B767 AMM 35-11-51. OPS & LEAK CHECK GOOD. THIS CLEARS DMI 160411.</P>)