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Mod 13 > Onboard Maintenance System Q’s > Flashcards

Onboard Maintenance System Q’s Flashcards

1
Q

Fatigue fuses used in structure monitoring

A

Are bonded to the structure and fail at different fatigue stresses

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2
Q

A HUMS in a helicopter is

A

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

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3
Q

A MCDU is

A

To dialog with the CMC

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4
Q

A modern aircraft CMC used

A

A CRT screen

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5
Q

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

A

The printer roll needs replacing

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6
Q

Aircraft condition monitoring monitors

A

Certain parameters

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7
Q

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

Where do you fit it

A

LH side

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8
Q

An aircraft condition monitoring system

A

Stores information for long term error analysis

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9
Q

BITE fitted to onboard maintenance systems can be

A

Start up interruptive and continuous

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10
Q

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

A

Flight deck effects

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11
Q

HUMS failure has what effect

A

No indication until data is downloaded

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12
Q

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

A

Electronic interface units

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13
Q

In CMC warning signals are generated by

A

Warning computer

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14
Q

In a modern aircraft a bite is carried out

A

Continuously when the systems are working

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15
Q

In an autoland aircraft fitted with a CMC

A

All faults are recorded in non volatile memory

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16
Q

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

A

It must be installed on LH side

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17
Q

Maintenance messages

A

Are not made available to the crew

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18
Q

MCDUs

A

Enable dialog with the CMC

19
Q

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

A

Through the ground test function

20
Q

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

A

Non volatile memory

21
Q

Power to the CMC is from the

A

Standby AC bus

22
Q

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

A

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

23
Q

The CMC

A

Can be used to simulate aircraft in the air

24
Q

The flight phases in the CMC start at

A

Power on

25
Q

The purpose of ACMS is to

A

Detect the source of a fault

26
Q

The real time on a cmc is when

A

Existing faults page is selected on the CDU

27
Q

The uploading function on an onboard maintenance system enables

A

The onboard data base to be updated

28
Q

What devices aids structural monitoring of aircraft

A

Electrical strain sensors

29
Q

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

A

Data loader

30
Q

What does the expression electronic flight library system refer to

A

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

31
Q

What is most appropriate for maintenance data

A

Data at maintenance base provided in real time

32
Q

What is one reason for structural monitoring

A

To develop a preventative maintenance policy

33
Q

What is provided by the CMC fitted to
Modern aircraft

A

A centralised location for aeroplane fault information

34
Q

What is the reason for dual cmcs being fitted

A

Redundancy protection

35
Q

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

A

Piezo device

36
Q

What type of memory do CMCs have

A

Non volatile

37
Q

Hat unit in a HUMs system carries out the data acquisition

A

DAU

38
Q

Where are modern aircraft printers located

A

Centre pedestal

39
Q

Where are the CMC accessed from

A

Flight station CDUs

40
Q

Why are modern aircraft fitted with printes

A

To print faults recorded by the CMC to aid in rectification

41
Q

With a ACMS quick access recorder

A

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

42
Q

With OBM systems the purpose of CMF is to

A

Log relavent maintenance data

43
Q

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

A

Must be connected to the left side

Mod 13 (22 decks)

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