M15.10

Question 1

What does the lubrication system distribute oil to?

Answer 1

Bearings
Gearboxes

Question 2

What type of sump do GTE’s use?

Answer 2

Dry sump

Question 3

Where is supply filter located on the lubrication system?

Answer 3

Downstream of supply pump

Question 4

What is the purpose of the scavenge system?

Answer 4

To return oil from bearing and gearbox components to oil tank

Question 5

What are the 4 subsystems that make up the oil system?

Answer 5

Resvour
Scavenge
Vent
Monitoring

Question 6

What does the vent system do to air?

Answer 6

Vent it to the atmosphere

Question 7

What do bearings have to release the sealing air?

Answer 7

Vent line

Question 8

How many scavenge systems does each oil system have?

Answer 8

1 scavenge pump per line

Question 9

What does the monitoring system monitor?

Answer 9

Oil quantity
Oil pressure
Oil temp

Question 10

What are the sensors in the fuel monitoring system?

Answer 10

Quantity sensor
Pressure sensor
Temp sensor
Low oil pressure switch
Filter clogging switch

Question 11

What type of indicator is the mechanical clogging indicator?

Answer 11

A pop out indicator

Question 12

EIU

Answer 12

Engine Interface Unit

Question 13

What does the EIU do?

Answer 13

Relieves info from sensor to perform required measurements

Question 14

What are the 2 types of transmitters used for oil quantity?

Answer 14

Capacitance type
Reef switch type

Question 15

How do we get a oil pressure indication?

Answer 15

Transmitter senses the pressure difference between the total oil pressure in the oil supply and vent pressure in oil tank

Question 16

What does the de-oiler do in the vent system?

Answer 16

Separate the oil from the air before it is vented overboard

Question 17

What type of pumps are oil pumps?

Answer 17

Positive displacement pumps

Question 18

What does the reed switch do to give oil level indications?

Answer 18

Uses a magnetic float that opens and closes switches as it moves up and down

Question 19

Where does the oil temp thermocouple get its power from?

Answer 19

It generates its own power

Question 20

Why do you wait 5 mins after shutting down before opening the oil filled cap?

Answer 20

The slow the oil tank to depressurise

Question 21

Why is the engine oil replenishment recorded?

Answer 21

To keep track of engine oil consumption

Question 22

How is engine low oil pressure warning shown in cockpit?

Answer 22

A warning sign come on and a aural sound as well

Question 23

Where is the oil temp sensor found?

Answer 23

In the scavenge system

Question 24

What are the 2 types of oil temp sensors?

Answer 24

Thermocouple
Thermistor

Question 25

SOAP?

Answer 25

spectrometric Oil Analysis Program

Question 26

What does SOAP do?

Answer 26

Scientificly examine oil to see if there are particles in it that may not have been caught by the filter

Question 27

What is the smallest size of particle a scavenge oil filter is able to catch?

Answer 27

0.015mm

Question 28

What is the negative with using a scavenge oil filter system?

Answer 28

Filter not changed very often Filter inspection takes time

Question 29

What’s the positives of a magnetic chip detector?

Answer 29

Easier Takes less time Can be electronically checked

Question 30

How can you tell electronically if there are particles on the magnetic chip detector?

Answer 30

Has 2 magnets on the tip the ECU monitors resistance and if there are particles the resistance will decrease

Question 31

How can you check the oil level?

Answer 31

On ECAM/EICAS Or Sight gauges

Question 32

On engines without anti siphon when must you check the oil leaves?

Answer 32

5-20mins after engine shut down

Question 33

Why must you wait 5mins before opening oil cap after shut down?

Answer 33

Hot oil could spray out

Question 34

Where can details for the required oil type be found?

Answer 34

On a label close to the oil tank filler vap

Question 35

When must the magnetic chip detector be inspected?

Answer 35

At fixed intervals

Question 36

What are the rules regarding magnetic chip detectors?

Answer 36

Engineer can only check one engine and must get it cross checked

Question 37

What PPE must you wear when inspecting magnetic chip detectors?

Answer 37

Gloves as may be hot