What was found
IAS DISAGREE EICAS MSG DISPLAYED. NRC 869387 TROUBLESHOT IAS DISAGREE EICAS MSG IAW FIM 34-12-00 IAW FIG 107, BLK 1& 13, FIM 34-11-00 PG1 FIG104, PERFORMED FULL RANGE PITOT SYS, FND FO'S PITOT SYS LEAKING. APPLIED SNOOP TO FO'S PLUMBING FITTINGS & FND NUT AT RT UPPER PROBE LEAKING. TIGHTENED NUT IAW AMM 34-11-01-4. & RETESTED IAW AMM 34-11-00-5, FO'S PITOT SYS CHECKED GOOD.