Module 7.13 Flashcards

1
Q

how can you check the quality of a compression fitting that has been swaged onto a control cable?

A

with a go/ no go gauge

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2
Q

what is the longest that can have an end fitting swaged onto it?

A

3/8’’ in diameter

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3
Q

where should the swaging of the terminal fitting start ?

A

-put cable in. mark the point on the cable at the end of the fitting, take it out and mark the length on the barrel then from here mark on diameter back

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3
Q

if the cable has a plastic coating, what must be done before swaging?

A

removal of the plastic coating

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4
Q

how can you stop the cable moving inside the fitting before swaging?

A

place half in, the bend enough to hold the cable in

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4
Q

what are the methods of swaging?

A
  • hand
  • hydraulic/ pnuematic
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5
Q

what % of it’s breaking strength must a cable be tested to ?

A

60% of it’s breaking strength

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6
Q

how must the testing load on the cable be applied?

A

gradually, and held for at least 3 mins

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7
Q

how many compressions does a nicopress termination have ?

A

3

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8
Q

how much should the cable extend out the fitting once looped back?

A

1/8’’

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9
Q

what is a safety feature added to nicopress to help inspection

A

paint band to check for slippage

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10
Q

what is the recommended inspection interval for control cables

A

annual or 100 hours

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11
Q

how should you check for fraying on a control cable?

A

run a cloth up and down the cable

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12
Q

when does blending usually occur?

A

when outer wires are worn out by 40% - 50%

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13
Q

how should a pully be set up?

A

so no sideways forces are acting

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14
Q

what should the cable be when inspecting the pulley?

A

slack

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15
Q

what must fairleads never be used for?

A

changing direction

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16
Q

what is a fairlead made of?

A

soft plastic or fibre

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17
Q

how are pressure seals created?

A

filled with grease

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18
Q

what must all pulleys have?

A

guard pins

19
Q

what must be done to a cable before it can be used? and how might this load be applied?

A

pre load the cable by applying at steady speed for 5 mins

20
Q

when are cables allowed to be pre-loaded?

A

when they are not bent

21
Q

if the cable is over 30m how can it be pre loaded?

A

over a moveable guide pulley

22
Q

how must cables be tensioned throughout the system?

A

evenly with the use of turnbuckles

23
what are the two types of locking method for turnbuckles?
locking wire or locking clips.
24
how do you measure the tension of an aircraft cable?
tensiometer
25
what acuracey does a tensiometer have?
98%
26
where should tension be measured?
on long stretches, not near pulleys.
27
how is a reading obtained on a tensiometer?
wire under the anvils and user pushes up onto the cable
28
what should be used in the cable system to get good tensioning results?
rigging pins and gust locks
29
what is a bowden cable normally made from?
CRES
30
what is the construction of a bowden cable?
inner CRES cable, coiled wire around which is covered in cotton braiding
31
what are the two methods of returning a bowden cable?
spring or having two cables
32
what are the two methods of adjusting bowden cable tension?
adjustable stop or double ended stop?
33
how is the tee barrel secured to the barrel?
nut with a lock nut
34
when would a double ended stop be used?
when there is limited access
35
on a double ended stop, what is the tee barrel replaced with?
internally threaded tube with witness holes
36
where on the cable are the hand levers located?
transmitting end
37
what are the three types of hand lever
-plain -ratchet type -thumb
38
how much throw in a radial motion do ratchet and plain type have?
90mm
39
how many pulls does the ratchet type hand level allow?
more than one
40
thumb type hand levers have a shorter lever, what does this mean?
35mm throw
41
what is the simplest inspection method?
move cable the whole motion and hold with a cotton cloth
42
what are two benefits to teleflex cables?
-much stronger than bowden - push and pull action
43
what wrap should single and double teleflex cables be?
40 degree and 180 degree
44
how often should control cables be inspected?
every 100 hours or annually
45
where is the most common place for control cable damage?
at bends
46
where should cables be inspected for correct tension, damage and route security?
engine control and flight control