What was found
NGS DEGRADED, BLUE LIGHT ILLUMINATED. FOUND FAULT NGS OXYGEN SENS FAIL ON EXISTING FAULT. PERFORMED BITE TEST REF 47-31 TASK 801. TEST FAILED OXYGEN SENSOR FAIL MESSAGE 47-30062. T/S CONTINUE IAW FIM 47-31, TASK 838. REPLACED NGS SYSTEM OXYGEN SENSOR, PERFORMED BONDING CHK, CHKD GOOD. PERFORMED ELECTRICAL SYS OPS TEST. TEST PASSED, DEGRATION LIGHT HAS RETURNED TO GREEN STATUS IAW AMM 47-42-03-420-801, AMM 47-00-00-800-801. C/W AMM 47-42-03-200-001. OXY SENSOR INLET TUBE INSP, FOUND NO FUEL ODOR & NO LIQUID FUEL PRESENT. BONDING CHK IS WITHIN LIMITS.