What was found
3EA SUPERNUMERARY OXYGEN MASKS INOP / ( CREW OXYGEN SYSTEM / SUPERNUMERARY OXYGEN MASKS / ASSOCIATED SEAT NOT OCCUPIED )(<P>PLACED ON MEL 141888 IAW MEL 35-11-02-03A, CAT C.</P><P>RIV MX, 06FEB. LP 1271467, ITEM M8: REMOVED AND REPLACED #1 SUPERNUMERARY SEAT O2 MASK PER AMM 35-11-51, OPS NORMAL. P/N OFF: MC10-08-114, S/N OFF: B119217. </P><P>LP 1271467, ITEM M9: REMOVED AND REPLACED #2 SUPERNUMERARY SEAT O2 MASK PER AMM 35-11-51 OPS NORMAL. P/N OFF: MC10-08-114, S/N OFF: B119215. </P><P>LP 1271468, ITEM M10: REMOVED AND REPLACED #3 SUPERNUMERARY O2 MASK PER AMM 35-11-51. OPS NORMAL.</P><P>ITEM M11: DUE TO REPLACEMENT OF ALL 3 SUPERNUMERARY O2 MASKS, THIS CLEARS DMI 141888. ALL PLACARDS REMOVED. SD 0140Z.</P>)