CHAPTER 79
PAGE 9
MAINTENANCE MANUAL EXTRA 300LT
PAGE DATE: 7. July 2010
79-30-00 INDICATING
Oil pressure and oil temperature are sensed on the EXTRA
300LT engine and are indicated to the pilot in command.
Refer to chapter 77-40 if an integrated engine instrument
system is installed.
Trouble Shooting
Trouble Possible Cause Remedy
No oil pressure indication Sensor defective Replace sensor.
Gauge defective Replace gauge.
Oil pressure low Engine oil pressure low Check engine oil pressure
with calibrated equipment.
Orifice engine fitting Clean fitting.
blocked
Sense line leakage Replace sense line.
Oil temperature high Sensor or cable defective Replace sensor.
Repair cable defect.
Gauge defective Replace gauge.
Incorrect engine oil Perform engine oil change.
79-30-10 Oil Pressure
The oil pressure gauge is located in the rear instrument
panel. The gauge receives its data electrically from a pressure
sensor located on the aft side of the firewall (refer to
figure 4). The pressure sensor (1) is connected to a bulkhead
fitting (2) on the cold side of the firewall. A sense (wet) line
(3) connects the bulkhead fitting to the reducer fitting (4) at
the engine.
PAGE DATE: 4. June 2009
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