Module 7.13

Question 1

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

Answer 1

with a go/ no go gauge

Question 2

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

Answer 2

3/8’’ in diameter

Question 3

where should the swaging of the terminal fitting start ?

Answer 3

-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

Question 3

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

Answer 3

removal of the plastic coating

Question 4

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

Answer 4

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

Question 4

what are the methods of swaging?

Answer 4

• hand
• hydraulic/ pnuematic

Question 5

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

Answer 5

60% of it’s breaking strength

Question 6

how must the testing load on the cable be applied?

Answer 6

gradually, and held for at least 3 mins

Question 7

how many compressions does a nicopress termination have ?

Answer 7

3

Question 8

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

Answer 8

1/8’’

Question 9

what is a safety feature added to nicopress to help inspection

Answer 9

paint band to check for slippage

Question 10

what is the recommended inspection interval for control cables

Answer 10

annual or 100 hours

Question 11

how should you check for fraying on a control cable?

Answer 11

run a cloth up and down the cable

Question 12

when does blending usually occur?

Answer 12

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

Question 13

how should a pully be set up?

Answer 13

so no sideways forces are acting

Question 14

what should the cable be when inspecting the pulley?

Answer 14

slack

Question 15

what must fairleads never be used for?

Answer 15

changing direction

Question 16

what is a fairlead made of?

Answer 16

soft plastic or fibre

Question 17

how are pressure seals created?

Answer 17

filled with grease

Question 18

what must all pulleys have?

Answer 18

guard pins

Question 19

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

Answer 19

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

Question 20

when are cables allowed to be pre-loaded?

Answer 20

when they are not bent

Question 21

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

Answer 21

over a moveable guide pulley

Question 22

how must cables be tensioned throughout the system?

Answer 22

evenly with the use of turnbuckles

Question 23

what are the two types of locking method for turnbuckles?

Answer 23

locking wire or locking clips.

Question 24

how do you measure the tension of an aircraft cable?

Answer 24

tensiometer

Question 25

what acuracey does a tensiometer have?

Answer 25

98%

Question 26

where should tension be measured?

Answer 26

on long stretches, not near pulleys.

Question 27

how is a reading obtained on a tensiometer?

Answer 27

wire under the anvils and user pushes up onto the cable

Question 28

what should be used in the cable system to get good tensioning results?

Answer 28

rigging pins and gust locks

Question 29

what is a bowden cable normally made from?

Answer 29

CRES

Question 30

what is the construction of a bowden cable?

Answer 30

inner CRES cable, coiled wire around which is covered in cotton braiding

Question 31

what are the two methods of returning a bowden cable?

Answer 31

spring or having two cables

Question 32

what are the two methods of adjusting bowden cable tension?

Answer 32

adjustable stop or double ended stop?

Question 33

how is the tee barrel secured to the barrel?

Answer 33

nut with a lock nut

Question 34

when would a double ended stop be used?

Answer 34

when there is limited access

Question 35

on a double ended stop, what is the tee barrel replaced with?

Answer 35

internally threaded tube with witness holes

Question 36

where on the cable are the hand levers located?

Answer 36

transmitting end

Question 37

what are the three types of hand lever

Answer 37

-plain
-ratchet type
-thumb

Question 38

how much throw in a radial motion do ratchet and plain type have?

Answer 38

90mm

Question 39

how many pulls does the ratchet type hand level allow?

Answer 39

more than one

Question 40

thumb type hand levers have a shorter lever, what does this mean?

Answer 40

35mm throw

Question 41

what is the simplest inspection method?

Answer 41

move cable the whole motion and hold with a cotton cloth

Question 42

what are two benefits to teleflex cables?

Answer 42

-much stronger than bowden
- push and pull action

Question 43

what wrap should single and double teleflex cables be?

Answer 43

40 degree and 180 degree

Question 44

how often should control cables be inspected?

Answer 44

every 100 hours or annually

Question 45

where is the most common place for control cable damage?

Answer 45

at bends

Question 46

where should cables be inspected for correct tension, damage and route security?

Answer 46

engine control and flight control