Podcast
Questions and Answers
What does increasing RGB oil pressure indicate?
What does increasing RGB oil pressure indicate?
- Proper lubrication of moving parts
- System pressure relief valve malfunction
- Debris causing restrictions in the oil galleries (correct)
- Issues with the accessory drive train
Where does the system pressure relief valve release pressure back into if it exceeds approximately 250 PSI?
Where does the system pressure relief valve release pressure back into if it exceeds approximately 250 PSI?
- Propeller brake
- Planetary gear system
- Main drive gear
- Rear case of the RGB (correct)
Which part of the RGB assembly requires oil lubrication directly?
Which part of the RGB assembly requires oil lubrication directly?
- Accessory drive train
- Planetary gear system (correct)
- Propeller brake
- Pinion input gear
How is the accessory drive train lubricated in the RGB assembly?
How is the accessory drive train lubricated in the RGB assembly?
What divides the RGB into two main parts in the scavenge system?
What divides the RGB into two main parts in the scavenge system?
Which pumps are used for effective scavenging of the RGB?
Which pumps are used for effective scavenging of the RGB?
What is the purpose of the system pressure relief valve in the RGB oil system?
What is the purpose of the system pressure relief valve in the RGB oil system?
How does the oil return to the accessory gearbox after being removed by the breather?
How does the oil return to the accessory gearbox after being removed by the breather?
What type of pump drives the RGB oil pump and filter assembly?
What type of pump drives the RGB oil pump and filter assembly?
What component prevents the oil tank from draining into the RGB when the engine is not operating?
What component prevents the oil tank from draining into the RGB when the engine is not operating?
In which part of the RGB is the filter located?
In which part of the RGB is the filter located?
What is an important feature of the RGB pump pressure adjustment?
What is an important feature of the RGB pump pressure adjustment?
What is the purpose of the nose scavenge pump in the Allison T56 engine?
What is the purpose of the nose scavenge pump in the Allison T56 engine?
Which pump is mounted inside the reduction gear assembly in the Allison T56 engine?
Which pump is mounted inside the reduction gear assembly in the Allison T56 engine?
What drives the nose scavenge pump in the Allison T56 engine?
What drives the nose scavenge pump in the Allison T56 engine?
At what pressure does the pressure relief valve in the scavenge system of the Allison T56 engine relieve pressure?
At what pressure does the pressure relief valve in the scavenge system of the Allison T56 engine relieve pressure?
Where does the oil dumped by the pressure relief valve go in the Allison T56 engine?
Where does the oil dumped by the pressure relief valve go in the Allison T56 engine?
What component does the main scavenge pump in the Allison T56 engine primarily scavenge oil from?
What component does the main scavenge pump in the Allison T56 engine primarily scavenge oil from?
