Cables

Uncritical fatigue areas

Cables that are not flexed, rubbed or worked in any manner other than a straight pulling motion are called these.

Strand

Each group of wires helically twisted or laid together is designated as this.

Wire

Each individual cylindrical steel rod or thread is designated as this.

Visual inspection or rag inspection

How can broken wires be detected on the cable.

A groove or knurl around outer edge barrel

How can the left handed barrel threads on a turnbuckle be identified?

Greater than 6 inches

How far away from any turnbuckle, end fitting, pulley, fairlead, or regulator shaft should a tensiometer reading be taken from?

3 broken or loose wires.

How many broken or loose wires can be in an uncritical area before the cable must be replaced?

Three threads exposed Four threads internal

How many threads are you allowed to have exposed or or internally on the turnbuckle assembly?

No broken wires

How many wires are allowed to be broken in a critical area of a cable assembly?

A clean, dry, coarse-weave rag or fiber brush And mil spec mil-c-16173, grade 4 CPC.

How must surface corrosion on a cable be removed in accordance with AFTO 1-1A-8, Chapter 11?

These

Nuts

1/16" to 3/8"

The 7x19 cables are available in diameter sizes from what to what?

3/64" to 3/32"

The 7x7 cables are available in diameter sizes from what to what?

19x7

The cable used on a rescue hoist is a highly flexible cable and is made of how many strands and how many wires?

Quadrants

These are commonly used in engine control systems in the cockpit and in the engine compartment.

pulleys

These are designated to change cable direction while producing a minimum amount of friction and wear. these are grooved wheels constructed of metal or phenolic material.

Cable terminals

These are devices attached to the cable to make up a cable assembly. They are also used to adjust and connect control cables to various components.

Locking clips

These are spring steel clips which are used to secure aircraft turnbuckle assemblies.

Threaded terminals

These are swaged to cables and is commonly a component of a turnbuckle assembly.

Ball terminals

These are switched to cables as an attachment point to connect the cable to a component in the system. Commonly this component would be a sector or quadrant.

Eye and fork end terminals

These are used to attach a cable to a flight control or similar component. these terminals are also swaged to the end of the cable.

critical fatigue area

This area is when a cable contacts a pulley, fairlead, or any other component or structure. the cable within 12 inches of a swaged fitting is also this.

A cable

This is a group send of corrosion resistant steel wires twisted or laid on a central core to form a steel wire rope.

cable tensiometer

This is a tool used to measure the amount of tension or pull on an installed cable assembly. it determines its tention by measuring the amount of force required to deflect the cable.

Swaging

This is defined as a squeezing process by which the middle of the terminal is cold-flowed on to the cable.

Pressure seal

This is used where a cable or control rod passes through a bulkhead from a pressurized area to an unpressurized area .

split fairlead or grommet

This is used where an individual cable passes through a bulkhead of a non-pressurized compartment.

Excessive tension

This type of wear leaves a depressed imprint of the cables strands on the pulley.

Oversized pulley

This wear is a narrow groove worn in the bottom of the pulley.

Frozen bearing

This wear is when a groove is worn on one side of the pulley as the cable slides over the pulley instead of the pulley rotating.

Cable misalignment

This wear is when a pulley is worn excessively on the upper or lower side by the cable rubbing against the edge.

40% & 50%

Wear on a cable between what and what percent should be written up in EAL, and the cable assembly be replaced at the next convenient time.

Abrasion, chaffing, and reducing cable vibration

What are cable guides used to protect against?

3x7 7x7 7x19 6x19

What are four sizes of cable used?

Fairleads, grommets, and pressure seals

What are the 3 types of cable guides?

Step 1: obtain applicable ACMS card Step 2: obtain cable tensiometer Step 3: obtain cable diameter from the ACMS card Step 4: install correct riser on tensiometer.

What are the four preliminary steps necessary to take before using a cable tensiometer?

Anvil, anvil, body, riser, trigger, pointer lock, pointer, dial

What are the seven parts of a tensiometer?

step 1) place leather palmed gloves on hand step 2) wrap a rag around the cable step 3) slide the rag along the cable

What are the three steps for performing the rag method inspection on a cable?

7x7 & 7x19

What are the two most common aircraft control cables?

Safety wire

What besides locking clips can secure aircraft turnbuckle assemblies?

Sectors and quadrants

What change the lateral motion of the cables to a rotational motion and gain mechanical advantage by means of leverage.

Nada used in converting the tensiometer pointer reading into pounds of tension

What is a tensiometer conversion chart used for?

Identify the different fatigue areas, recognize and identify any damage, and know the damage limits

What must an AMT identify during control cable inspections?

Complete a rag method inspection on cable

What must be performed after completing the internal inspection of the cable for cable corrosion?

Flexible ,corrosion resistant steel, type 1, mil. Spec. Mil-c-s18375 cable

What type of cable is used in the coast guard?

Double shank ball single shank ball threaded eye end fork end terminals

terminal fittings are generally of the swaged type. What are some type of swaged terminals?

Fairleads

these are generally made from plastic or phenolic material, they are designed to prevent abrasion and to support long runs of cable to lessen vibration.

A sector

this is at the engine end of the control cables where the linear motion of the cables are changed to rotational motion for engine control inputs. These may also have a push-pull control rod attached.

Cable assembly

this is defined as a length of cable with fittings swaged on each end.

Broken wires, corrosion, and cable wear

what three types of damage are aircraft control cables subject to?

Cable

A group of strands helically twisted or laid about a central core strand is designated as this.

1/16" to 3/8"

Aircraft control cables vary in diameter from what size to what size?

Greater than 50%

At what percent cable wear should the cable be replaced immediately .

Critical fatigue areas and uncritical fatigue areas

Cable assembly inspections are divided into what two types?

Flexible without setting Routed easily around obstacles Installed over long distances Cable failure is never abrupt Lightweight No loss of motion

Cables have many advantages over the mechanical linkage of push-pull rods. What are some examples.