(11) Do a minimum idle check (Ref. TASK 71-00-00-710-006). Do a check for leaks (Ref. TASK 79-00-00-210-003).

 5. Close-up
________
 Subtask 79-00-00-410-057
 A. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.

 (2) Close the fan cowls (Ref. TASK 71-13-00-410-040):
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR.

 (3) Remove the warning notice(s).

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 E 56-5B E
 E E
 OIL TANK - DESCRIPTION AND OPERATION

____________________________________
 1. General
_______
 **ON A/C 001-049, 051-061, 101-105, 151-151, 201-203,
 (Ref. Fig. 001)
R **ON A/C 062-099, 106-149, 152-199, 204-299, 301-399, 401-499,
 (Ref. Fig. 001A)
 **ON A/C ALL
 The oil tank stores the oil used to lubricate and cool the rotating components of the engine. It is installed on the left side of the fan case at the 8 o'clock position, and above the main oil/fuel heat exhanger.
 2. Description
___________
 **ON A/C 001-049, 051-061, 101-105, 151-151, 201-203,
 The oil tank consists of an envelope and a cover. It is attached to the fan
 frame at 3 points.
 (Ref. Fig. 001)

 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.
 B. Oil Tank Envelope (Ref. Fig. 001, 002) The envelope determines the tank capacity. It is a one piece, light-alloy alumunium casting. Three bulkheads, integrally-cast with the tank envelope, connect the tank walls internally to reduce oil sloshing and strengthen the envelope structure.
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 E 56-5B E

 Oil Tank
 Figure 001

 F 『R EEFF : 001-049, 051-061, 101-105, 151-151, E Page 279-11-10
 E E201-203, May 01/05 E E ECES E F 『 E C F M E E E E 56-5B E

 Oil Tank
 Figure 001A

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 E 56-5B E

 Vent System
 Figure 002

 F 『R EEFF : 001-049, 051-061, 101-105, 151-151, E Page 479-11-10
 E E201-203, May 01/05 E E ECES E The envelope front wall has a recessed area provided with 2 nipples ; one serving as an overfill port and the other for pressure filling port. The envelope bottom has a boss containing, internally, a screen just upstream of the oil out port and, externally, an other boss to mount the oil tank drain plug. The right-hand tank wall has a filler cap for the manual filling of tank by gravity. The upper tank envelope section is provided with a bolted cover. Air tightness between the cover and the tank envelope is provided by a sealing compound.

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 C. Oil Tank Cover The cover is a light-alloy casting bolted and sealed with a sealing compound. It consists of the following major functional items : one oil-in port, one vent port, one oil quantity transmitter port, one air differential pressure switch nipple and one pressure tap nipple.
 (1) An oil supply pump draws oil from the bottom of the tank to supply engine parts with lubricating oil.

 (2) The oil-in tube port discharges tangentially into a cavity connected with the tank vent and directing the air/oil mixture to a static air/oil separator or de-aerator. (Ref. Fig. 002) The static air/oil separator extracts the air from the scavenged oil and vents the air in the tank to the forward oil sump via the TGB. It has a tube extending through the tank cover to the tank bottom. The lower part of the tube is provided with a deflector to prevent disturbances near the suction port. The upper part has a swirler to accelerate the oil to provide for air/oil separation. The tube length prevents the pressure-equalizing conduit from being flushed during negative-g flight. A nipple on top of the oil scavenge cavity allows for installation of a line connection with the TGB.

 (3) The oil quantity transmitter (Ref. 79-31-00).
　
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