Oil Pressure Indicator
Engine oil pressure is displayed on the default ENGINE page by the OIL PSI
horizontal bar indicator. The indicator range is 0-120 PSI with a red line at
40 PSI, an amber band from 40 to 85 PSI (caution range), a green band from
85 to 105 PSI (normal operating range), and a red line at 105 PSI. A white
pointer indicates actual oil pressure. Oil pressure is also indicated adjacent to
the horizontal bar indicator digitally. Oil pressure is also displayed digitally on
the SYSTEM and FUEL EICAS pages.
When oil pressure is less than 40 PSI or greater than 105 PSI, the title,
pointer and digits ash red. When oil pressure is between 40 and 85 PSI, the
title, pointer and digits are amber. Otherwise, the title and pointer are white
and the digits are green.
Figure 7-68 – Oil Pressure Indicator
Oil Temperature Indicator
An indication of oil temperature is provided through the Garmin G1000. The
instrument provides an electrical indication of the oil temperature in degrees
Celsius. The oil temperature sensor is located near the upper right portion
of the engine accessory gearbox. The instrument markings illustrate the
minimum operating temperature (red line) of -40°C, a caution range (yellow
band) from -40 to +10°C, a normal operating range (green band) from 10°C to
99°C and a maximum temperature (red line) at 99°C.
Figure 7-69 – Oil Temperature Indicator
NEW ENGINE BREAK-IN AND OPERATION
There are no specic break-in procedures required for the Pratt & Whitney
Canada PT6A-34 turboprop engine. The engine may be operated safely
throughout the normal ranges established by the manufacturer at the time the
airplane is delivered.
NOTE: When starting a cold-soaked engine, it is normal for the oil psi to
exceed the normal operating range for approximately three (3) minutes,
while the engine oil warms up. Pressures as high as 150-200 psig may be
observed at startup; this is not detrimental to the engine and does not need
to be monitored. Maintain ground idle speed until oil pressure drops back
within the normal operating range.
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