15.22 - Engine Storage and Preservation Flashcards
What should be done to the fuel system of an engine when storing for up to 1 month?
They must be protected from the corrosion which can result from water held in suspension in the fuel. Fuel cocks must also be turned off.
What should be done to the lubrication systems of an engine when storing for up to 1 month?
Drained, filters removed and cleaned OR filled with normal levels of clean system oil or storage oil.
What should be done to the externals of the engine when storing for up to 1 month?
Corrosion should be removed, retreat areas affected and then desiccant or vapour phase inhibitor should be inserted in the intake/exhaust and all apertures should be fitted approved covers or blanks.
What additional tasks should be done if storing an engine over 1-6 months?
Grease all control rods and fittings;
Blank off all vents and apertures on the engine
An aircraft engine that is in a moisture vapor proof envelope (removed from the aircraft) should be inspected for corrosion and be preserved again after how long?
3 years
When placing an engine in an MVP envelope, the humidity indicator should be checked after how long?
24 hours
What colour does the humidity indicator turn when showing humid conditions?
Pink (blue is normal, no humidity)
At what interval should engines that are not preserved in a sealed envelope be inspected?
Approximately every 2 weeks
True or false; only the fuel system requires inhibiting oil due to the corrosive effect if water is present in the fuel?
True.
What are the three methods of oil circulation?
Motoring method
Pressure rig method
Gravity method
What should happen to bleed valves if removing an engine for long term storage?
They should be open but blanked off
When is the humidity indicator checked on a preserved engine?
In monthly intervals
If an engine is installed, but inhibited; when should re-preserving take place?
Every 6 months
If an inhibited engine is given periodic ground runs, where should this be noted?
In the engine log book
What does long-term storage class as?
up to 6 months
