What was found
AFTER ENGINE START THE LEFT ENGINE OIL PRESSURE WAS 56 PSI WITH THE OUTSIDE AIR TEMPERATURE -11 DEGREES FAHRENHEIT AND OIL TEMPERATURE WAS COLD. THE LEFT FUEL HEAT WAS CYCLED TO WARM OIL TEMPERATURE AND LEFT OIL PRESSURE REDUCED TO 54 PSI AS TAKEOFF POWER WAS APPLIED, THE LEFT OIL PRESSURE INCREASED TO 56 PSI (ABOVE LIMIT). REMOVED AND REPLACED THE OIL PRESSURE TRANSMITTER. LEAK AND OPERATION CHECKS GOOD BY RUNNING NR 1 ENGINE, REFERENCE MAINTENANCE MANUAL 79-33-1.