Oil System Flashcards
What are 5 purposes of an oil system
- Lubrication
- Sealing
- Cooling
- Cleaning
- Protection
The cool seal lubes up and wears protection to stay clean
When must oil be checked and be within specified limits
BEFORE EVERY FLIGHT
How tightly must an oil filler cap be tightened
LIGHT FINGER TIGHT
What are the 2 typical types of oil used
- “Straight” (S) - Mineral
- “W” - Ashless Dispersant
When is “straight” oil preferrably used
What quality does it lack
- Engine with new parts
- Less lubricating qualities
Used in engines with new parts for wear in
Aditives in “W” type oil have what 2 benefits
- Prevent Corrosion
- Dissolve particals and other fluids
What 2 grades of oil are typically used
- 80 / S80 / W80
- 100 / S100 / W100
The grade of oil to be used is dependent on what
AMBIENT AIR TEMPERATURE
Higher grade oil numbers have THINNER or THICKER oil for a given air temperature
THICKER
In relation to oils,
1. What must you NOT mix
2. What is OK to mix
- Oil Types i.e. S & W
- Oil Grades i.e. 80 & 100
How does oil collect in a WET SUMP oil system
BOTTOM OF ENGINE
How does oil collect in a DRY SUMP oil system
SCAVENGE PUMP
What are the 2 oil system sump types
- WET
- DRY
Takes oil from the sump and provides oil at pressure to the rest of the engine
OIL PUMP
Allows particulates to be trapped
OIL FILTER
Allows for reduction in oil temperature
OIL COOLER
How is an oil cooler cooled
AIRFLOW
What component allows oil to bypass the oil cooler system should it become blocked
OIL COOLER PRESSURE RELIF VALVE
What side of the pressurised system is the Oil Pressure Sensor located
HIGH PRESSURE SIDE
High pressure side of the oil distribution system
Component attached to the oil temperature sensor to provide the pilot with an indication of temperature
OIL TEMPERATURE GAUGE
After engine start, what gauge should always be checked first
After how long should engine be shut down if gauge does not rise
- OIL PRESSURE
- 30 SECONDS
