13 - Control Cables Flashcards
After cable installation, is proof testing required?
Not required.
What should be done with a control cable that has been contaminated with acid?
It should be rejected.
Why is a balance cable installed in a control system?
To enable the cable to be tensioned.
How should you use a Pacific T5 tensiometer?
Use the correct chart and the correct riser.
What is the purpose of an aileron balance cable?
To equalize control cable tension.
How should you inspect a cable for fraying?
Run a rag along the full length of the cable.
How can aircraft control cables be cut during manufacturing?
Using a chisel on a flat metal surface.
How do you check for cable pull‑out from a swaged fitting?
Look for a shiny surface on the cable near the fitting.
What is the minimum diameter for a reel used to hold an aircraft cable in storage?
At least 40 times the cable diameter.
How is the issue of tension loads breaking locking wires or lock nuts on large control cables overcome?
A tube is fitted over the turnbuckle assembly and drilled to take up to 3 bolts, preventing independent rotation.
What can help correctly tension cables in a control system?
Having control surface locks to support weight and adjust turnbuckles equally.
Under what condition should a cable be replaced?
If a chemical spillage is suspected.
What is the proof load for cables after swaging?
50% minimum breaking strain.
What is the best method to check control cables for broken wires?
Run a rag along the cable in both directions.
What is the result of excessively tightening turnbuckles in a control system?
The aircraft will be heavy on controls.
Why is a control cable proof loaded?
To ensure that the end fittings on the cable are secure.
How are British turnbuckles checked for safety?
By attempting to pass a hardened pin probe through the inspection hole.
If a chemical spillage is suspected on a cable, what should be done?
Replace the cable.
How are HTS aircraft control cables protected from corrosion?
By galvanising.
What is the purpose of the hole in the swaged end fitting on a swaged cable?
To ensure the cable end passes the inspection hole on drilled‑through fittings while leaving the locking wire hole clear.
What is the purpose of the inspection hole in a turnbuckle?
To ensure that the turnbuckle is in safety.
How is swaging of a cable end fitting checked?
Using a go/no-go gauge on the barrel.
When is a flight control cable replaced?
When single wires are blended together.
What effect does a control surface lock have in aircraft control cables?
It prevents both the control surface and control column from moving.
When checking cable tensions, what should you look for?
Full and free movement.
At what level of wear should a cable be replaced because individual wires are worn?
When they are worn greater than 40%.
