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Questions and Answers
Why is the cut-off valve (6) important in the engine support I system?
What is the purpose of the centrifugal breather (4) mentioned in the text?
What is the function of the chip detector (11) in the oil system?
Which component protects the oil tank from contamination in case of TS/APU failure?
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How is oil scavenging carried out in the system according to the text?
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How is the oil tank attached to the engine brackets?
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What is the purpose of the oil level switch (3) in the oil tank?
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How is the oil tank filled with oil?
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What component supplies oil from the fuel-cooled oil cooler to the tank?
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How is air separated from oil in the tank?
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Study Notes
Lubrication and Breather System
- Ensures lubrication and breathing of the engine and aircraft accessory gear box
- Consists of oil tank, aircraft pipe connection, drain valve, oil pump block with filter, oil pressure transmitters, hydraulic accumulator, scavenge pump unit, chip detector, cut-off valve, afterburner fuel-cooled oil cooler, breather with barostatic, and main fuel-cooled oil cooler
Oil Tank
- Supplies oil to engine, AAGB, and TS/APU
- Equipped with aircraft pipe connection for servicing with ground equipment
- Has drain valve for draining oil from engine oil tank
Oil Pump Block
- Delivers oil and maintains pressure in engine oil system pressure line within specified limits
Scavenge Pump Unit
- Designed for scavenge of oil from engine supports, internal drive, EAGB, and AAGB
- Equipped with protective filters at inlets
Fuel-Cooled Oil Coolers
- Cools oil at engine outlet
Centrifugal Breather
- Designed for oil separation from air-oil mixture supplied through breather system
Hydraulic Accumulator
- Ensures serviceability of support III bearing during short-term cutoff of oil supply from main line
Cut-Off Valve
- Prevents overfilling of engine support I with oil in case of engine shutdown
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Description
Learn about the engine lubrication and breather system, which ensures lubrication and breathing of the engine and aircraft accessory gearbox. This chapter covers components such as the oil tank, drain valve, oil pump block, oil pressure transmitters, hydraulic accumulator, and scavenge pump unit.
