What was found
BLOCK TURN BACK, LEFT OIL PRESSURE EICAS IN AMBER. DECREASE TO RED RANGE. READ 8 PSI, SHUT ENGINE DOWN AND RETURNED TO RAMP. OIL PRESSURE LIGHT NOT ILLUM. REMOVED AND REPLACED LEFT ENGINE OIL PRESSURE TRANSMITTER, LEAK AND OPS CK'D OK. P/N OFF 418-09104. S/N OFF 9501031. P/N ON 418-09104. S/N ON 9537088.