2 - General Concepts Flashcards
What are the color systems of structural identification used on older aircraft structures?
Primary - Red, Secondary - Yellow, Tertiary - Green.
What are the categories of the aircraft structures?
Primary, Secondary and Tertiary Structures.
Give examples of primary structures
Loss of Control, Power Unit Failure, Catastrophic structural collapse, Inability to operate a service
Fail-safe design concepts of aircraft structures are?
Fail-safe concept is the sufficient strength for operation of the aircraft with acceptable standard of safety.
Safe-life are?
Period of time which is considered that the failure of the component is extremely unlikely, might not be possible to happen cause the component is tested way above its limits. Eg- Flying hours, elapsed time, number of flights or number of application of load.
Damage Tolerant Concept?
A single or dual attachment had to be heavily reinforced, to help slow down the process of full damage.
Lateral, Vertical and horizontal location on aircraft identified by?
Fuselage Station, Wing Station, Butt Line and Water Line.
Which system may be used in component labeling and work card area identification?
Zone Identification such as 100, 200, 300, 400, 500, 600, 700, 800, 900. The most is 1000.
Zone 400 is which part?
Engines, both sides.
Zone 100 is?
Normally lower deck, Fuselage.
300 zone is on?
The Vert Stab.
What’s the value of the fuselage station number forward of the Datum Line (FS0)?
0
In pure bending, what stresses are the structure subjected to?
Compression and Tension.
The section of wing spar outboard of the supporting struts is subjected to what bending stresses in flight and on ground?
Compression
Describe the stresses on the Wing struts both on the ground as well as in the air
On air, the struts is in Tension but on ground is on Compression.
On ground, the struts is in Compression but on air is on Tension.
