(4) The oil gravity filling system includes a filler cap with a retention chain. Externally, it has an oil scupper and a drain tube to drain oil spills during gravity filling or servicing of the tank. (Ref. Fig. 003)

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 Vent System
 Figure 002A

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 Oil Tank Gravity Filling System
 Figure 003

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 D. Oil Tank Characteristics
 (Ref. Fig. 004)

 -------------------------------------------------------------------------------| | US QUARTS | LITERS | |-----------------------------------|-----------------------------------------| | Oil reserve for safe operation in | 2.5 | 2.35 | | engine attitudes defined in | | | | diagram A (see NOTE) | | | |-----------------------------------|-----------------------------------------| | Max gulping effects | 8 | 7.56 | |-----------------------------------|--------------------|--------------------| | Min usable oil volume | 10 | 9.46 | |-----------------------------------|--------------------|--------------------| | Min of the max oil total capacity | 20.7 | 19.6 | |-----------------------------------|--------------------|--------------------| | Total tank volume | 24 | 22.7 | -------------------------------------------------------------------------------
NOTE : Including indicating accuracy plus or minus 0.16 USgal (0.61 l).
____
 E. Oil Consumption
 NOTE : The two values of engine autonomy, expressed in hours below, are
____ calculated on the basis of the minimum usable oil volume of 2.50 USgal (9.46 l) (Ref. paragraph Oil Tank Characteristics)
 (1) Normal oil consumption rate During a normal engine operation, the normal oil consumption rate is not expected to exceed 0.15 USgal.h (0.57 l.h) (approximately 0.6 quart.hr) (see note). This provides a minimum engine autonomy of almost 17 hours.
 NOTE : The necessary process of troubleshooting an higher than normal
____ consumption rate starts as soon as the oil consumption rate exceeds 0.22 USgal.h (0.83 l.h) (approximately 0.9 quarts.hr). . From this time on, the oil consumption must be closely monitored until corrective actions have returned it to normal, or at least, have stabilized it under this value.
 (2) Maximum oil consumption rate The maximum oil consumption rate during engine operation is limited to 0.40 USgal.h (1.51 l.h) (approximately 1.6 quarts.hr) (see note): This provides a minimum engine autonomy of 6 hours.
 NOTE : Above this limit, the engine is not serviceable and must be
____
 removed.

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 Oil Tank Gravity Filling System
 Figure 003A

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 Oil Tank Schematic and Engine Flight Attitude Limits
 Figure 004

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 The oil tank is covered with a paint. It is made with cast housing in
 one part (head and separator are built-in). It is attached to the fan
 frame at 3 points.
 (Ref. Fig. 001A)

 A. Oil Tank Functions The engine oil tank has provisions for both gravity and pressure filling. It allows suction of the oil from its bottom section, while the engine is at any attitude within 30 degrees of the horizontal in either pitch or roll. The tank is equipped with a oil level sight gage and with a continuous (indication) oil quantity transmitter. A drain plug is provided at the bottom of the tank for oil drainage purposes.
　
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