What was found
EN ROUTE FROM PHL TO DCA, PLANE RECEIVED A LIGHTNING SRIKE TO LEFT HAND SIDE OF PLANE. CREW RECEIVED A LOW OIL PRESSURE WARNING AND NR 1 ENGINE SHUT DOWN. CAPTAIN TRIED TO RESTART NR 1 ENGINE, RESTART WAS SUCCESSFUL, BUT RECIVED A LOW OIL PRESSURE WARNING AND CREW SHUT THE ENGINE DOWN. FLIGHT WAS NORTH OF BWI. CREW DECLARED AN EMERGENCY AND DIVERTED INTO BWI WITH ONE ENGINERUNNING. MX INSPECTED A/C FOR DAMAGE AND INSPECTED ENGINES. FOUND FAULTY OIL PRESSURETRANSMITTER ON THE NR 1 ENGINE. REMOVED AND REPLACED NR 1 ENGINE OIL TRANSMTITER IAW F-100 AMM 71-00-00. PERFORMED OPERATIONAL TEST OF NR 1 ENGINE. OPERATIONAL TEST PERFORMED GOOD IAW 71-00-00.