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2A753 VOL 3. Unit 4
Aircraft Structural Maintenance Journeyman
Question | Answer |
---|---|
What type of aluminum allot tubing do you use to repair a hydraulic system that carries high pressures up to 3,000 psi? | 6060-T. |
The preferred tubing material for manufacturing external aircraft brake lines is what? | Corrosion resistant stainless steel tubing type 304. |
Which color designates aluminum allow AN and military specs? | Blue. |
To be considered objectionable, the depth for a dent on a tubing assembly is what? | 20 percent of the tube diameter. |
The probable cause of excessive burrs while cutting tubing with tube cutter is what? | Too much pressure was applied on the cutting wheel at one time. |
How do you remove foreign material from inside a completed tubing assembly? | Flush with a TO approved solvent. |
To properly locate the start point on a piece of tubing that will have only one bend, you do what? | Estimate the amount of tubing needed to make the bend, plus additional material for the flare. |
What can you do to prevent thick-wall aluminum tubing from slipping in the clamp block of the production tube bender? | Place a piece of emery cloth between the tubing and the clamp block. |
Which method would you use to bend a piece of tubing if a tube bender is not available? | Sand. |
To correctly construct a single flare, you make the outside diameter what? | Extend approximately 1/16 inch beyond the end of the sleeve. |
For tubing flares to seat properly, they must be what? | Square and concentric. |
To properly use the squaring- and burring- head assembly on the power-flaring machine to work a piece of tubing, you position the tubing in a vise so it is what? | Beyond the flaring dies. |
While using the squaring-and burring-head assembly on the power flaring machine the probable cause of more inside chamfer on one side of a piece of tubing and more outside chamfer on the opposite side is what? | Misalignment between the spindle and vise jaw. |
To readjust the spindle on a powered flaring machine for another size tubing, you? | Change the flaring center setting to match the OD of the new size tubing. |
To remove the tubing after you have finished making a flare with the double-flaring machine, you move the operating lever where? | To the no. 1 position, and then push the lever toward the rear of the machine. |
What is not used to preset a military specification sleeve onto a piece of tubing? | Jaw nut. |
When is it permissible to reswage a Dynatube swage? | Never. |
To properly perform a Permaswage operation, you place the silver face of the die holder to a position that does what? | Corresponds with the silver side of the yoke. |
Dynatube expanders designed for titanium are identified by stop collars painted what color? | Yellow. |
To properly make a dynatube repair, you should have what degree of chamfer on the inside diameter of a tube? | 60 degrees. |
To inspect the ring position of a swage Pemalite fitting, you use what? | An inspection Gage. |
What is not an inspection requirement for a Wiggins fitting? | Ensure the alignment mark is still visable. |
How do you position a rynglok fitting on the tube before swaging? | Anywhere along the length of the positioning mark. |
The end marking template for a permalite fitting is based on the tubing what? | Outside diameter. |
When installing a fitting how much hydraulic pressure do you apply to the rynglok tooling? | 8,000-8,500 pounds per square inch gage. |
When installing you military specification fittings which type of aluminum alloy tubing would you use as a replacement for 5052-0 aluminum alloy tubing? | 6061-T6. |
Once the chipless tube cutter makes light contact on the tube, you do what? | Tighten the drive screw an additional 1/8 - 1/4 a turn. |
To properly deburr a piece of tubing for a permaswage repair, you must not allow the chamfer width to exceed how much? | 1/2 the wall thickness. |