engine

1. PW1100G-JM GENERAL FAMILIARIZATION
Lubrication
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LUBRICATION
ATA 79
CHAPTER 7
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Lubrication
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Lubrication
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OBJECTIVES
1. Describe the purpose of the Lubrication System.
2. Locate system components.
3. Describe the purpose of the auxiliary oil supply.

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Lubrication
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OVERVIEW
The Lubrication System supplies filtered, non-regulated pressurized
oil to lubricate engine bearings, gears, and accessory drives. Oil is
also used to clean engine parts, cool heated part surfaces, and
warm cold fuel to prevent icing.
The Lubrication System consists of five interactive subsystems,
described at right.
System Function
Storage • Maintains adequate oil supply
Distribution
• Sends oil where and when necessary
• Cleans and filters unwanted material before oil
is used
• Removes heat from the engine, using heat
exchangers
Scavenge
• Removes oil from bearing compartments and
returns it to the tank
Breather
• Releases bearing compartment air pressure
resulting from heat expansion and bearing
buffer ventilation
Indicating
• Provides information about oil quantity,
temperature and pressure

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BEARING ASSY STATORS ROTATING PARTS
ATTACHMENTS
PRIMARY OIL-DEPENDENT COMPONENTS

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STORAGE SYSTEM
The Storage System consists of a pressurized hot oil tank, which
stores the oil and supplies it to the engine’s Oil Distribution System.
The oil tank assembly is located on the fan case on the left hand
side of the engine at approximately 9:00.
The pressurized assembly has a capacity of 35 quarts. A deaerator
in the tank removes air bubbles before the oil goes into the tank.
A pressure relief valve in the tank releases air/oil pressure to the
deoiler in the Main Gearbox when necessary. A sight glass shows
the oil level in the tank and provides a visual indication of the
number of quarts or liters to be added. There is also a connection
for a level indicator on top.
.
A hinged cap on the tank is provided for servicing. A scupper drain
vents spills overboard through the drain mast.
Oil is returned hot to the tank through the Scavenge System. The
tank is wrapped in a heat shield with spring attachments. The heat
shield insulates the tank from the heat of the HPT case.
KEY FACT
The engine’s oil system is referred to as a hot tank
system due to the hot oil that is scavenged and returned
to the tank for re-use.

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BEARING ASSY STATORS ROTATING PARTS
ATTACHMENTS
OIL TANK

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DISTRIBUTION SYSTEM
Overview
The Distribution System supplies non-regulated pressure oil to
lubricate, cool, and clean engine bearings, gears, and accessory
drives. The system has primary distribution and auxiliary lubrication
operations.
Primary Distribution
Primary oil distribution components are listed below.
Auxiliary Lubrication
An auxiliary capability provides a secondary source of oil for the
journal bearings in case of negative gravity or windmill conditions.
Components are listed below.
• Auxiliary tank
• Dual stage fan oil pump
• Lubrication and Scavenge
Oil Pump
LSOP
• Oil Control Module OCM
• Main oil filter element
• Variable Oil Reduction Valve VORV
• Journal Oil Shuttle Valve JOSV
• Active Damper Shut Off Valve ADSOV
• Air/Oil Heat Exchanger AOHE
• Fuel/Oil Heat Exchanger FOHE
• Fuel/Oil Heat Exchanger
Bypass Valve
FOHEBV
• IDG Oil/Oil Heat Exchanger IDGOOHE
• Last chance oil strainers

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BEARING ASSY STATORS ROTATING PARTS
ATTACHMENTS
DISTRIBUTION SYSTEM

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Lubrication
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DISTRIBUTION SYSTEM (Cont.)
Components
Lubrication and Scavenge Oil Pump (LSOP)
This pump has seven positive displacement gear pump stages. Six
of the stages return oil from the bearing compartment and
gearboxes. The seventh stage pressurizes oil and sends it to the oil
control manifold. Chip collectors in each of the return lines catch
metallic particles that may be in the scavenge oil.
The pump is installed on the left front of the Main Gearbox.
Oil Control Module (OCM)
OCM sensors and components measure oil pressure and
temperature, and control oil flow. Oil flows into and through this
module, using external oil tubes and internal gearbox and OCM
housing passages. The OCM is attached to the left side of the Main
Gearbox. Components include: Main Oil Pressure (MOP) sensor ;
Low Oil Pressure Sensor (LOPS); Active Damper Shut-Off Valve
(ADSOV); Fuel/Oil Heat Exchanger Bypass Valve (FOHEBV) ; and
Main Oil Temperature (MOT) sensor .
Main Oil Filter Element
The main oil filter element removes solid contaminants from the oil.
It is a dual-element, disposable filter integral to the LSOP.
Variable Oil Reduction Valve (VORV)
The VORV regulates the flow of oil to bearing nos. 1, 1.5, and 2, and
reduces the amount of oil that flows to the Fan Drive Gear System
during cruise. The VORV is mounted to the CIC firewall on the
VORV/JOSV manifold.
Journal Oil Shuttle Valve (JOSV)
This valve senses oil pressure to the Fan Drive Gear System journal
bearings. If main oil pressure to the journal bearings decreases, the
JOSV sends auxiliary oil from the internal pump. The JOSV is
mounted to the CIC firewall on the VORV/JOSV manifold.
Active Damper Shut-off Valve (ADSOV)
The ADSOV is a FADEC-controlled dual channel valve that controls
oil flow to the No. 3 Bearing damper to limit high spool vibration and
provide bowed rotor protection. The ADSOV is located on the OCM.

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DISTRIBUTION SYSTEM
Components (Cont.)
Air/Oil Heat Exchanger (AOHE)
The AOHE uses fan air to cool the engine oil. The assembly is
attached to the engine at 11:00 next to the diffuser case.
Fuel/Oil Heat Exchanger (FOHE)
The FOHE transfers engine oil heat to the fuel, preventing ice
formation and providing the temperature for optimal fuel burn. The
FOHE is attached to the Thermal Management System manifold.
Fuel/Oil Heat Exchanger Bypass Valve (FOHEBV)
This modulating valve controls oil flow between the FOHE and
AOHE. The FOHEBV is mounted to the Thermal Management
System manifold.
IDG Oil/Oil Heat Exchanger (IDGOOHE)
The IDGOOHE uses engine oil to cool IDG oil and is mounted to the
Thermal Management System manifold.
KEY FACT
Line Replaceable Units (LRUs) are components that
can be removed and installed on the flight line in a short
interval. Distribution System LRUs are centered around
the body of the Oil Control Module to simplify
maintenance.

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Lubrication
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DISTRIBUTION SYSTEM
Components (Cont.)
Last Chance Oil Strainers
Large particles can enter the oil supply beyond the main oil filter on
the Oil Control Module. Last chance oil strainers prevent these
particles from entering bearing compartments and clogging oil
nozzles.
Strainer locations for various components are shown at right.
Component Oil Strainer Location
Bearing nos. 1, 1.5, 2
Oil pressure tube for all three
bearings
Fan Drive Gear System FDGS oil pressure tube
No. 3 Bearing No. 3 Bearing oil pressure tube
No. 4 Bearing No. 4 Bearing pressure tube
Bearing nos. 5 and 6 No. 5 Bearing oil pressure tube
Main Gearbox Engine left side at 7:30

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Lubrication
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BEARING ASSY STATORS ROTATING PARTS
ATTACHMENTS
LAST CHANCE OIL STRAINER LOCATIONS
BEARING ASSY STATORS ROTATING PARTS
ATTACHMENTS

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Lubrication
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DISTRIBUTION SYSTEM (Cont.)
Oil Circulation
Oil flow through the engine is described below.
1. Oil flows from the oil tank to the Lubrication and Scavenge Oil
Pump (LSOP). The pump pressurizes the oil and sends it
through the OCM and on to the main oil filter.
2. Filtered oil then goes to the Fuel/Oil Heat Exchanger Bypass
Valve (FOHEBPV). The modulating bypass valve is controlled
by the EEC. The valve distributes the oil between the Fuel/Oil
Heat Exchanger and/or the Air/Oil Heat Exchanger. Oil sent to
the AOHE will also go through the IDGOOHE, which cools
IDG oil.
3. All the cooled oil then returns to the Oil Control Module to be
distributed to the engine main bearings, the FDGS, journal
bearings, the gearboxes, and the PMA.
Only cooled oil is supplied to the Fan Drive Gear System
journal bearings. A mix of cooled and uncooled oil flows to all
other bearings and gears.
4. Nozzles in the main bearing compartments and gearboxes
supply the oil at correct flow rates to bearings, seals, gears, and
accessory drive splines.
5. An Active Damper Shut-off Valve controlled by the EEC provides
oil to the No. 3 Bearing damper system on an ON/OFF schedule.

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DISTRIBUTION SYSTEM OIL FLOW

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DISTRIBUTION SYSTEM (Cont.)
Auxiliary Lubrication System
The Auxiliary Lubrication System protects the FDGS journal
bearings from low oil pressure conditions that could cause loss of
oil. Low pressure conditions include windmill operation (in flight or
on the ground), and zero gravity or negative gravity events.
The system consists of a dedicated dual stage fan oil pump located
in the front bearing compartment and driven by the fan rotor. The
dual stage pump continuously draws oil from a dedicated auxiliary
reservoir and compartment sump located in the front bearing
compartment.
In normal conditions the pump sends the reservoir and sump oil to
the Journal Oil Shuttle Valve (JOSV), which directs the oil back to
the oil tank. In low oil pressure conditions the JOSV directs the oil to
journal bearings, ensuring their lubrication.
Zero Gravity or Negative Gravity Events
For these events the pump draws oil from the auxiliary reservoir,
which is continuously replenished by oil slung from the gear system.
Windmill Operations
For these operations the pump draws oil through the compartment
sump, which is continually replenished by oil cast off from the gear
system and main shaft bearings.

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AUXILIARY LUBRICATION SYSTEM

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Lubrication
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SCAVENGE SYSTEM
The Scavenge System pumps the oil from the bearing
compartments and gearboxes back to the oil tank.
The system consists of a Lubrication and Oil Scavenge Pump
(LSOP). The pump has six stages that return oil from the areas
listed below.
• Front bearing compartment servicing the FDGS and bearing
nos. 1, 1.5 and 2
• No. 3 Bearing compartment
• No. 4 Bearing compartment
• Compartment for bearing nos. 5 and 6
• Main Gearbox
• Angle Gearbox
The stages send scavenged oil to the oil tank, where a deareator
separates the air that has mixed with the oil. Air that is separated
from the oil pressurizes the oil tank.
The system also has six magnetic chip collectors.

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Lubrication
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BEARING ASSY STATORS ROTATING PARTS
ATTACHMENTS
LUBRICATION AND SCAVENGE OIL PUMP WITH CHIP COLLECTORS

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Lubrication
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SCAVENGE SYSTEM (Cont.)
Components
Magnetic Chip Collectors
The Lubrication and Oil Scavenge Pump has six magnetic chip
collectors. The collectors catch ferrous metal particles in the
scavenge oil that are used to diagnose system problems.
Five of the collectors are located on the LSOP and a sixth is found
on the No. 4 Bearing scavenge return tube.
Each area listed below has its own collector.
• Front bearing compartment (servicing the FDGS and bearing
nos. 1, 1.5 and 2)
• No. 3 Bearing compartment
• No. 4 Bearing compartment
• Compartment for bearing nos. 5 and 6
• Main Gearbox
• Angle Gearbox

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SCAVENGE SYSTEM

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Lubrication
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BREATHER SYSTEM
During engine operation, sealing air flows into the bearing
compartments. The sealing air must be vented to allow a
continuous flow. The sealing air that vents is referred to as breather
air.
The engine oil Breather System removes air from the bearing
compartments, separates the breather air from the oil, and vents the
air overboard.
The No. 3 Bearing compartment has a dedicated breather vent tube
that vents the breather air directly to the deoiler in the Main
Gearbox. The breather air flows to the deoiler as a mist of air and
oil. The deoiler separates the oil from the air, returning the oil to the
engine and sending the air overboard through the deoiler vent duct.
Sealing air in the other bearing compartments mixes with scavenge
oil and flows back to the oil tank. A static deaerator in the tank
separates the oil from the air. The released air pressurizes the tank.
The pressure in the tank is controlled by a spring-loaded closed,
mechanical poppet valve. The valve opens to release excess
pressure in the tank and sends the excess air /oil mist to the deoiler.
Breather air from the Main Gearbox flows internally from gearbox to
deoiler.
Components include the deoiler, deoiler vent duct and the deoiler
drive oil seal.

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BEARING ASSY STATORS ROTATING PARTS
ATTACHMENTS
DEOILER AND VENT DUCT (AFT VIEW)

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BREATHER SYSTEM

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Lubrication
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INDICATING SYSTEM
The Indicating System monitors Lubrication System conditions and
alerts the flight crew to potential problems.
Components in the system send signals to the Electronic Engine
Control (EEC), which in turn notifies the flight deck’s Electronic
Centralised Aircraft Monitoring System (ECAM).
Sensors are listed below.
• Oil Level Sensor OLS
• Oil Filter Differential Pressure OFDP
• Oil Debris Monitor ODM
• Main Oil Temperature MOT
• Main Oil Pressure MOP
• Low Oil Pressure LOPS
• Auxiliary Oil Pressure Sensor AOPS

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INDICATING SYSTEM (Cont.)
Components
All components except the Oil Level Sensor are located on the Oil
Control Module.
Oil Level Sensor (OLS)
The single-channel sensor alerts the flight deck to the amount of oil
in the tank. The sensor is located on top of the oil tank.
Oil Filter Differential Pressure Sensor (OFDP)
The Oil Filter Differential Pressure sensor measures the ∆P across
the filter and sends this information to the EEC. The sensor is
located adjacent to the oil filter housing.
Oil Debris Monitor (ODM)
The Oil Debris Monitor detects both ferrous and non-ferrous debris
in the Lubrication System. Debris count information is sent to the
PHMU for processing, and forwarded to the EEC. The EEC then
sends a signal to ECAM, alerting the flight crew.

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BEARING ASSY STATORS ROTATING PARTS
ATTACHMENTS
LUBRICATION INDICATING SYSTEM COMPONENTS (1 OF 2)

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INDICATING SYSTEM
Components (Cont.)
Main Oil Temperature Sensor (MOT)
The Main Oil Temperature (MOT) sensor is a dual channel sensor
that measures the temperature of scavenge oil returned to the oil
tank.
Main Oil Pressure Sensor (MOP)
The Main Oil Pressure sensor is a dual channel sensor that
measures the oil pressure on the supply side of the lubrication
system.
Low Oil Pressure Sensor (LOPS)
This sensor signals the EEC when main oil pressure drops below a
given limit.
Auxiliary Oil Pressure Sensor (AOPS)
The Auxiliary Oil Pressure Sensor measures the pressure of the oil
being delivered to the journal bearings in the Fan Drive Gearbox
under normal, windmill, and negative gravity conditions. The
reading is used to detect latent failures in the Journal Oil Shutoff
Valve or the Windmill/Auxiliary pump. It is installed on the
VORV/JOSV manifold.

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BEARING ASSY STATORS ROTATING PARTS
ATTACHMENTS
LUBRICATION INDICATING SYSTEM COMPONENTS (2 OF 2)

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BEARING ASSY STATORS ROTATING PARTS
ATTACHMENTS
LUBRICATION INDICATING SYSTEM

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LUBRICATION SYSTEM CYCLE