LOSS OF OIL PRESSURE IN L ENG RESULTS IN AN ENG SHUTDOWN AND SUBSEQUENT DIVERT AND LNDG AT THE NEAREST SUITABLE ARPT.

Narrative

WHILE INBOUND TO THE VOR; ABOUT 240 NM TO THE E; THE #1 ENG OIL PRESSURE INDICATOR ON THE LOWER DISPLAY UNIT STARTED FLASHING AMBER. THE OIL PRESSURE READING WAS MOVING IN AND OUT OF THE AMBER RANGE. OIL QUANTITY INDICATED ZERO. ALL OTHER ENG INDICATIONS WERE IN THE NORMAL RANGE. AFTER WE ANALYZED THE SITUATION; I CALLED FOR THE FO TO RUN THE 'ENG LOW OIL PRESSURE' CHKLIST IN THE QRH. AFTER COMPLETING THE CHKLIST; I GAVE ACFT CTL TO THE FO AND INSTRUCTED HIM TO HANDLE ATC COMS. AFTER DISCUSSING THE SITUATION WITH THE DISPATCHER AND MAINT; WE ELECTED TO DIVERT TO ZZZ WITH THEIR CONCURRENCE. AT ABOUT 70-80 MI FROM ZZZ AT ABOUT FL280 THE OIL PRESSURE IN THE #1 ENG DROPPED INTO THE RED RANGE. AT THIS POINT THE 'ENG LOW OIL PRESSURE' CHKLIST REFERRED US TO THE 'ENG FAILURE/SHUTDOWN' CHKLIST; WHICH I CALLED FOR AND RAN; SHUTTING DOWN THE #1 ENG. WE DECLARED AN EMER WITH ATC AND CONTINUED TO ZZZ. WE FLEW A SINGLE ENG VISUAL APCH TO THE LONGEST RWY. THE WX WAS VERY HIGH BROKEN CLOUDS; GOOD VISIBILITY; WITH THE WINDS OUT OF THE S. THE LOC WAS OTS; SO AS A BACK-UP FOR THE VISUAL APCH WE BRIEFED AND SET UP TO USE LNAV AND VNAV INFO. WE ALSO BRIEFED OVERWT LNDG CONSIDERATIONS. AN UNEVENTFUL LNDG WAS MADE.