What was found
NAV LS TUNING DISAGREE SYSTEM RESET DIDNT WORK INFLIGHT FAULT WAS NOT PRESENT ON ARRIVAL. VERIFIED FREQUENCIES ON LS WERE TUNED TO SAME FREQ PREFORMED BITE TEST OF MMR 1 & 2 IAW AMM 34-36-00-740-006-A NO FAULTS. PREFORMED AFS TEST & LAND TEST IAW AMM 22-97-00-710-001-A / 22-96-00-710-001-A NO FAULTS. AND PREFORMED VOR 1 & 2, IR SYSTEM TEST REF AMM 34-14-00-740-001-A OPS CHECKS GOOD. COULD NOT DUPLICATE FAULT.