Fluid Lines And Fittings Flashcards
What are two types of fluid lines commonly found aircraft
Rigid metal lines and flexible hoses
When installing stainless steel tubing what type of fittings should be used
Stainless steel fittings
Describe the two type of flares commonly used on aircraft tubing
The single flare and double flare
How are standard AN type fittings identified
The color of the fitting and small shoulder between the thread and the flare
What are the names of the parts of a flareless tube fitting?
Nut and sleeve
What is the effect of a over-tightening a flare type fitting.
Sleeve will be pushed into the tube and weakening the tubing
How do you tell a flareless fitting from a flare-type fitting.
Flareless have a flare cone and no space between the threads and end of the fitting
Describe the method of classifying metal tube according to size
wall thickness and outside diameter.
When installing stainless steel tubing what type of fittings should be used
Stainless steel fittings
When routing a fluid line parallel to an electrical wire bundle, which should be on top?
The electrical wire bundle should be on top
Is the side of a flexible hose determined by its inside or it’s outside diameter?
By it’s inside diameter in 16ths of an inch
Is the size of a rigid or metal fluid line determined by its inside or it’s outside diameter?
Outside diameter and 16th of an inch and wall thickness is in 1000s of an inch
What precaution should be taken when routing fluid lines adjacent to electrical wiring?
Fluid lines should be below the electrical wires and 6 inches apart as and clamped to structure
Describe the operation for quickly disconnecting couplings.
Each half has a valve that is held open when coupled and is spring-loaded closed when disconnected
What are aircraft plumbing lines made of
Metal tubing and fittings or flexible hose
What is the purpose of the identification strip running along the length of the hose
Used to determine wether or not the hose was twisted during installation
What are the purpose of using quick disconnect couplings in fluid systems
To prevent fluid loss or air getting in the system
How much slack should be left In the hose when installing
5 to 8 % the length of the hose
What are the 3 parts of a military standard flare less tube fitting
Body, sleeve and nut
What precaution should be taken when debarring the cut end of a tube
Don’t crack the tube or reduce the wall thickness of the tube
