skyblue CBT oil and fuel Flashcards
what does the engine oil system provide?
lubrication of bearings and gearboxes
supplies oil pressure for prop actuation
what is the capacity of the main oil tank?
14.4L
what is the oil system pressure maintained by the regulator?
55-65 psi
where is the oil tank?
intergral with the rear inlet casting
what does the single system provide oil to?
reducton gearbox and turbo machinery
what are the 2 subsystems that make up the oil system?
presure system and scavenge system
what does the gear pump do?
pressurises the system and routes it to a cooler
what does the low temperature valve by the pressure gear pump do?
returns oil to the tank to prevent a pressure surge during cold start
where is the oil cooler located?
the engine inlet
how does the oil cooler cool oil?
inlet air, if a clog develops there is a bypass valve
where does oil flow to from the oil cooler?
pressure regulating valve
pressure filter
what does the pressure regulating valve do?
maintains a constant oil pressure in relation to the air pressure
what opens if the pressure filter gets clogged?
bypass valve
what 8 components is oil fed to after the pressure filter?
- fuel heater
- fuel cooled oil cooler
- reduction gearbox
- oil low pressure switch
- pressure transducer
6 temp sensor
- accesory gearbox
- engine bearing cavitys
what does the low pressure switch do?
feeds pressure info to the FWS and EWD
when will we get a LO OIL warning?
when oil pressure drops below 40 psi