Onboard Maintenance System Q’s

Question 1

Fatigue fuses used in structure monitoring

Answer 1

Are bonded to the structure and fail at different fatigue stresses

Question 2

A HUMS in a helicopter is

Answer 2

A system which monitors time period of components in service and warns of a premature failure

Question 3

A MCDU is

Answer 3

To dialog with the CMC

Question 4

A modern aircraft CMC used

Answer 4

A CRT screen

Question 5

A red line shows on a thermal sensitive airborne printer paper this indicates

Answer 5

The printer roll needs replacing

Question 6

Aircraft condition monitoring monitors

Answer 6

Certain parameters

Question 7

Aircraft normally fitted with 2 cmc and you only have one to dispatch the aircraft

Where do you fit it

Answer 7

LH side

Question 8

An aircraft condition monitoring system

Answer 8

Stores information for long term error analysis

Question 9

BITE fitted to onboard maintenance systems can be

Answer 9

Start up interruptive and continuous

Question 10

Central maintenance system considers the eicas warnings cautions and advisory messages as

Answer 10

Flight deck effects

Question 11

HUMS failure has what effect

Answer 11

No indication until data is downloaded

Question 12

In a CMC aircraft flight deck indications and warnings are managed and provided by the

Answer 12

Electronic interface units

Question 13

In CMC warning signals are generated by

Answer 13

Warning computer

Question 14

In a modern aircraft a bite is carried out

Answer 14

Continuously when the systems are working

Question 15

In an autoland aircraft fitted with a CMC

Answer 15

All faults are recorded in non volatile memory

Question 16

In case the aeroplane is wired for dual installation of the CMC and only one computer is to be installed

Answer 16

It must be installed on LH side

Question 17

Maintenance messages

Answer 17

Are not made available to the crew

Question 18

MCDUs

Answer 18

Enable dialog with the CMC

Question 19

On an aircraft fitted with a CMC how do you get to the system pages

Answer 19

Through the ground test function

Question 20

One of the inputs in a cmc is autopilot controls the data will be stored in

Answer 20

Non volatile memory

Question 21

Power to the CMC is from the

Answer 21

Standby AC bus

Question 22

The basic structure for the data chain for the onboard maintenance system for most aircraft compromises

Answer 22

System computer to central computer to graphics generator to flight deck displays

Question 23

The CMC

Answer 23

Can be used to simulate aircraft in the air

Question 24

The flight phases in the CMC start at

Answer 24

Power on

Question 25

The purpose of ACMS is to

Answer 25

Detect the source of a fault

Question 26

The real time on a cmc is when

Answer 26

Existing faults page is selected on the CDU

Question 27

The uploading function on an onboard maintenance system enables

Answer 27

The onboard data base to be updated

Question 28

What devices aids structural monitoring of aircraft

Answer 28

Electrical strain sensors

Question 29

What deceive is required to load software or install updated software to the FMC

Answer 29

Data loader

Question 30

What does the expression electronic flight library system refer to

Answer 30

A system of cd or disc data that lists all data configs and systems for that aircraft aircraft and carried on board

Question 31

What is most appropriate for maintenance data

Answer 31

Data at maintenance base provided in real time

Question 32

What is one reason for structural monitoring

Answer 32

To develop a preventative maintenance policy

Question 33

What is provided by the CMC fitted to Modern aircraft

Answer 33

A centralised location for aeroplane fault information

Question 34

What is the reason for dual cmcs being fitted

Answer 34

Redundancy protection

Question 35

What is the name given to sensors that convert mechanical energy into electrical energy by the force exerted on a crystal pile which are utilised in structural monitoring

Answer 35

Piezo device

Question 36

What type of memory do CMCs have

Answer 36

Non volatile

Question 37

Hat unit in a HUMs system carries out the data acquisition

Answer 37

DAU

Question 38

Where are modern aircraft printers located

Answer 38

Centre pedestal

Question 39

Where are the CMC accessed from

Answer 39

Flight station CDUs

Question 40

Why are modern aircraft fitted with printes

Answer 40

To print faults recorded by the CMC to aid in rectification

Question 41

With a ACMS quick access recorder

Answer 41

The tape can have used previously if it is first bulk erased

Question 42

With OBM systems the purpose of CMF is to

Answer 42

Log relavent maintenance data

Question 43

For aircraft with dual CMCs when only one CMC is available it

Answer 43

Must be connected to the left side