What was found
REF L/P 9747367 FOUND AIR SEPARATION MODULE 3261211-0101 INSTALLED ON AIRCRAFT NOT FOUND IN APIC FOR PARTICULAR AIRCRAFT EFFECTIVITY REF AIPC 47-11-01-02, ITEM NO. 310 FOR CORRECT PART NUMBER. WILL REQUIRE PART 2180163-101, M&E 61-4711-9-0001. PARTS ON ORDER IN TOCS. REMOVED AND REPLACED SECONDARY CHECK VALVE. NOTE: NO SMELL OF FUEL DETECTED. REF. AMM 47-21-04/401. PARTS USED: 29-4721-9-0002,QTY :1 1553238,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1553238 SN OFF 3713 VALVE, CHECK, 0 OFF 29-4721-9-0001 3713 ON 29-4721-9-0002 9248 REMOVED AND REPLACED O2 SENSOR. NOTE: NO SMELL OF FUEL DETECTED. REF. AMM 47-42-03/401. PARTS USED: 99-4742-9-9001,QTY :1 1515363,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1515363 SN OFF 7844 SENSOR, OXYGEN, OFF 99-4742-9-9001 7844 ON 99-4742-9-9001 3434 NGS O2 SENSOR REPLACED UPTO STEP I AMM TASK 47-42-03-420-801. STILL NEEDS C/BS CLOSED AND TEST PER AMM TASK 47-00-00-800-801. ACP NGS ELECTRICAL TEST, SYS TEST AND GROUND OPERATION REF AMM 47-00-00-80L-801, ALL TESTS PASSED. REF EC/RA 4711-01017 REV. A, ASM P/N 3261211-0101 IS APPROVED FOR THIS A/C 7258. ALL OTHER WORK ACP ON LOG #9747367.