DOC AIRBUS | AMM A320FSTORAGE - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
A. Oil Tank
The oil tank stores the oil used to lubricate and cool the rotating components of the engine. It is installed on the right-hand side of the fan case at the four o'clock aft looking forward position.
The oil tank is made from stainless steel sheet metal and is attached to the fan frame through 3 brackets (covered in zonal).
The oil tank features an inner bulkhead baffle providing rigidity near the mount points as well as reduction in oil sloshing within the oil tank.
The inner bulkhead baffle is also used as internal support structure for the Oil Level Sensor (OLS) (Ref. AMM D/O 79-30-00-00).
The size of the bulkhead baffle openings is very important compared to the size of a potential particle. A clogging of the Bulkhead Baffle is impossible.
The oil level sensor is mounted on the top of the Oil Tank and is bolted to a machined boss.
The oil level sensor has an electrical interface to the engine.
The oil-tank service panel houses all features necessary to service the oil tank.
The panel features an oil-tank connector kit (remote filling and an overflow quick disconnect connectors) for rapid oil servicing (optional), a sight glass for oil level indication, and a gravity filling (manual) port with a "swing open" oil fill cap.
Below the oil fill cap, the scupper retains any spilled oil from manual filling, and routes it to an overboard drain.
The oil fill cap has various safety features to prevent mishaps during servicing, the cap assembly features a strainer (large holed screen: average mesh diameter of 6.5 mm) to prevent oil system contamination at servicing.
The strainer features a provision allowing oil sampling. The oil fill cap also features a sealing flapper which prevents oil leakage and oil mist from escaping the oil tank in the event of an oil fill cap incorrectly locked.
The Oil Tank supports the Air/Oil Separator on the top most flange via 6 bolts (Ref. AMM D/O 79-30-00-00).
An Inlet O-ring makes sure that there is sealing between the oil tank and the air/oil separator.
The air/oil separator has a debris monitor feature (part of ODMS, covered in with an electrical interface as well. At the bottom of the oil tank, a supply interface flange is connected to the supply pump by a tube. This is the oil tank's outlet port, with an outlet gasket seal (Ref. AMM D/O 79-30-00-00).
There is an outlet strainer at this port to filter the oil before leaving the oil tank to protect the anti-leak valve and the supply pump of the lubrication unit against large contamination (average mesh size : 0.61 mm).
The size of the outlet strainer openings is very important compared to the size of a potential particle in normal operation. In normal operation, a clogging of the outlet strainer is impossible (Ref. AMM D/O 79-20-00-00).
The oil tank stores the oil used to lubricate and cool the rotating components of the engine. It is installed on the right-hand side of the fan case at the four o'clock aft looking forward position.
The oil tank is made from stainless steel sheet metal and is attached to the fan frame through 3 brackets (covered in zonal).
The oil tank features an inner bulkhead baffle providing rigidity near the mount points as well as reduction in oil sloshing within the oil tank.
The inner bulkhead baffle is also used as internal support structure for the Oil Level Sensor (OLS) (Ref. AMM D/O 79-30-00-00).
The size of the bulkhead baffle openings is very important compared to the size of a potential particle. A clogging of the Bulkhead Baffle is impossible.
The oil level sensor is mounted on the top of the Oil Tank and is bolted to a machined boss.
The oil level sensor has an electrical interface to the engine.
The oil-tank service panel houses all features necessary to service the oil tank.
The panel features an oil-tank connector kit (remote filling and an overflow quick disconnect connectors) for rapid oil servicing (optional), a sight glass for oil level indication, and a gravity filling (manual) port with a "swing open" oil fill cap.
Below the oil fill cap, the scupper retains any spilled oil from manual filling, and routes it to an overboard drain.
The oil fill cap has various safety features to prevent mishaps during servicing, the cap assembly features a strainer (large holed screen: average mesh diameter of 6.5 mm) to prevent oil system contamination at servicing.
The strainer features a provision allowing oil sampling. The oil fill cap also features a sealing flapper which prevents oil leakage and oil mist from escaping the oil tank in the event of an oil fill cap incorrectly locked.
The Oil Tank supports the Air/Oil Separator on the top most flange via 6 bolts (Ref. AMM D/O 79-30-00-00).
An Inlet O-ring makes sure that there is sealing between the oil tank and the air/oil separator.
The air/oil separator has a debris monitor feature (part of ODMS, covered in with an electrical interface as well. At the bottom of the oil tank, a supply interface flange is connected to the supply pump by a tube. This is the oil tank's outlet port, with an outlet gasket seal (Ref. AMM D/O 79-30-00-00).
There is an outlet strainer at this port to filter the oil before leaving the oil tank to protect the anti-leak valve and the supply pump of the lubrication unit against large contamination (average mesh size : 0.61 mm).
The size of the outlet strainer openings is very important compared to the size of a potential particle in normal operation. In normal operation, a clogging of the outlet strainer is impossible (Ref. AMM D/O 79-20-00-00).
B. Oil Tank Characteristics
- Max (fill to spill)
- Flight deck display: 17.1 US Quarts (16.2 liters)
- Corresponding oil quantity in the tank: 21.3 US Quarts (20.2 liters)
- Low oil level advisory
- Flight deck display: 1.35 US Quarts (1.3 liters)
- Corresponding oil quantity in the tank: 5.55 US Quarts (5.2 liters)
- Zero gauge
- Flight deck display: 0.00 US Quarts (0.0 liters)
- Corresponding oil quantity in the tank: 4.2 US Quarts (4.0 liters)
- Usable oil capacity
- Flight deck display: 8.9 US Quarts (8.4 liters)
- Corresponding oil quantity in the tank: 13.1 US Quarts (12.4 liters)
2. Operation/Control and Indicating
A. Oil Tank Pressurization and Venting
The oil tank is set to Accessory Gearbox (AGB) internal pressure via a vent line connected to the air/oil separator. The Tank Pressure Valve (TPV), part of the air/oil Separator (Ref. AMM D/O 79-30-00-00), pressurized the oil tank at high altitude, insuring the oil pump (Ref. AMM D/O 79-20-00-00) is always fed with the right oil pressure.
When the engine is running, the quantity of oil in the oil tank decreases due to gulping effect:
The oil tank is set to Accessory Gearbox (AGB) internal pressure via a vent line connected to the air/oil separator. The Tank Pressure Valve (TPV), part of the air/oil Separator (Ref. AMM D/O 79-30-00-00), pressurized the oil tank at high altitude, insuring the oil pump (Ref. AMM D/O 79-20-00-00) is always fed with the right oil pressure.
When the engine is running, the quantity of oil in the oil tank decreases due to gulping effect:
- Maximum gulping effect at Maximum Take Off power (MTO) 9 US quarts (8.5 liters).
- Normal gulping effect with engine at IDLE power (IDLE) 3.6 US quarts (3.4 liters).
B. Oil Quantity Indication
Two methods of indication:
Two methods of indication:
- One visual indication given by the sight glass for maintenance purpose.
- One indication given by the oil level sensor (Ref. AMM D/O 79-30-00-00).