Week 2 Flashcards
What should you use to check tire pressure
Tire pressure gauge
Tread depth gauge is a sleeve top gauge graduated in______ of an inch.
32nds
What is used to measure remaining tread and depth of cuts?
Tread depth gauge
What is formed between the outer ply of cord fabric and the thread or the sidewall rubber
Blisters
Causes tire to wear rapid and unevenly at the outer edges of the tread and develops higher temperatures during use
Under inflation
Reduces tread contact area causing the tire to wear faster in the center
Overinflation
Allows operator to safely remove the valve core from a pressurized tire
Palmer safe-cot valve tool(p/n968RB)
Assembly that is hand portable, pressure regulating device, used for inflating aircraft tires with pressures ranging from 50 to 600 psi
Remote tire inflator assembly (Six months calibration)
Ensure tire is_____ before removal
Deflated
Threaded screws and bolts using a circular ramp to transfer or support a load
Semi-permanent fasteners
Five types of semi permanent fasteners
Structural screws, machine screws, self tapping screws, structural bolts, and aircraft nuts
Made from steel alloy, are heat treated, have a definite grip length and have the same shear and tensile strength as equivalent size structural bolt
To assemble structural parts
Round, countersunk,& brazier
Structural screws
Made from low carbon steel, brass, corrosion resistant steel and aluminum alloys. They consist of heads and threads and usually have no grip length
General purpose use
Round, countersunk, fillister, and socket
Machine screws
Consist of two types, metal and sheet metal. They make their own internal threads as they are being turned into the hole.
For attaching name plates two components, and sheet metal for non-structural applications
Round, countersunk
Self tapping screws
Have definite grip lengths, heads and threads. They are made from the same material as structural screws.
To assemble structural parts.
Clevis, eye, external wrenching, and internal wrenching.
Structural bolts
To provide a means of loading and bolted assembly to a desired level.
Aircraft nuts
Never use in critical applications such control system linkages; they may be used to secure box covers or other non-safety flight items.
Self locking nuts
Require the use of a separate locking device, such as a cotter pin, safety wire or lock washer.
Non-self locking nuts
Used in general applications. Secured tightly by use of lock washer or safety wire.
Plain nut
Used in critical applications, for example, joints and aircraft control systems, installation of pulleys, cranks and linkages. Secured in place by use of a cotter key.
Castellated nuts
Plate nuts and gang channels.
Anchor nuts
Used to secure frequently replaced electronic opponents and are locked in place with safety wire
Wingnut
Quick release fasteners that come in various styles. can be locked or unlocked quickly
Turn lock fasteners
Flush- used to prevent drag on aerodynamically smooth surfaces
Oval or raised- used were dragons not a factor usually on the interior of aircraft
Wing-desiring to be locked or unlocked by hand and used on the interior of aircraft
Head styles
To secure panels or doors on the aircraft require frequent removal
Purpose of Turn-lock fasteners
Types of turn lock fasteners
Camloc, Dzus, airlock, and camloc high stress fastener
Has four parts- stud assembly, grommet, receptacle, and retaining ring.
Camloc
Has three parts- stud, grommet, and stationary spring.
Light duty- Used on box covers, access hole covers and light weight fairings.
Heavy duty- Used on cowlings and heavy fairings, and has same construction features as light duty
Dzus
Has three parts- Stud, crosspin, and receptacle.
Airlock fastener
Has a higher strength, quick release rotating fastener that locks or unlocks by turning the stud a quarter turn.
Camloc high stress fasteners
How is size of screws and bolts determined
Diameter, length, and threads per inch
Used for the assembly of structural parts.
Diameter is measured in sixteenths of an inch if a boat is larger than a quarter of an inch, it is normally sized by fraction
Sizing of screws and bolts
Insure the nut and bolt are the same diameter and have the same number of threads per inch
Bolt and screw installation/ removal
Used to measure outside diameter or thickness of parts
Has a U shaped frame which comes in different sizes
Attached to one end is a stationary measuring service called an anvil
Outside micrometer
Used to measure inside diameter, such as cylinders.
They are read the same as outside micrometers.
Inside micrometers
Used to measure depth of holes or grooves.
Sleeve scale is numbered from top to bottom
Leaves girl is numbered in the opposite direction of outside micrometers and read in reverse order
Depth micrometers
Force or turning effort required to apply attention to a fastener
Measured in inch pounds foot pounds and newton meters
Torque
Should be half to five eights inch long and bent back and under to prevent it from becoming a safety hazard
Pigtail
.020, .032, and .040
Common sizes of safety wire
Most positive and satisfactory method
Lock wire/safety wire
Two styles of wiring
Double twist and single wire
Used to secure castellated nuts, pins, and shafts
Sizing is determined by length and diameter
Cotter pins
Consist of two layers of material sandwiching a low density area.
The low density area gives the method it’s name.
Honeycomb
Consist of three or more layers of resin bonded fiberglass fabric
Solid laminate construction
Consist of precision laid strands of resin bonded fiberglass woven material. It’s appearance is similar to the weave on a spool of string.
Filament wound construction
How many general message of radome construction are there?
Four
Airworthiness of the aircraft could be seriously affected
Safety of the aircrew could be seriously affected
The enclosed antenna could be destroyed
The function of the equipment could be lost or completion of the mission could be impacted
Grade A
Would not seriously affect airworthiness or personal safety
The antenna would not be destroyed nor would a loss of function or mission occur
Grade B
Solid wall radomes typically used for nose radomes and Doppler navigation radar or windows
Style A
Thin wall radomes typically use for electronically warfare antenna covers to save weight when size and frequency permit
Style B
Simple sandwich multi layer wall radomes commonly used to overcome the environmental limitations of Style A and B radomes
Style C
Complex multilayer wall radome
Style D
Three major causes of damage to radomes
Careless handling, in-flight damage, and window deterioration.
Fracture occurs when the radome is unable to withstand the impact of raindrops
Rain impact
Damage occurs on all radome surfaces exposed to direct impact of raindrops during flight
Rain erosion
More severe than rain damage in that the radome Surface is bombarded by a hard ice particles
Hail damage
Damage occurs infrequently and results in damage ranging from scorch coatings, delamination, or holes burned completely through the radome wall
Lightning strike
Is very rare, but is so devastating to a radome that it demands mention
Foreign object strike
Caused by fluid contamination, the use of unauthorized materials, or chemical breakdown caused by exposure to authorize the materials over a long period of time.
Window deterioration
Damage to the paint or coating
Class 1
Damage that is not deeper than a second ply of cloth or filament
Class 2
Damage to the outer skin only
Class 3
Damage consist of a home in the outer skin with damage to the core
Damage may not exceed 1/2 the thickness of the wall
Defined according to the construction style
Class 4
Defined according to the construction style
Class 5
Master stores to dielectric properties of the part, including skin thickness, pattern distortion, and transmission efficiency.
Step joint method
Is only used when specifically authorized by the applicable MIM
Scarf joint method
Are explosive when mixed
Epoxy and polyester catalyst
What are the 2 constituents of a composite material
Fibers and the matrix
Is extensional stiffness of the fibers that allow ______________to replace aluminum or steel as a structural material
Advanced composite materials
Has a higher strength to weight ratio the metallic materials
The higher strength to weight ratio allows the lighter aircraft to carry payloads longer distances, with better fuel economy.
Advanced composite materials
What type of monitoring at a medical facility is required for all composite repair technicians
Respiratory monitoring
Preventative maintenance- Corrosion inspections, treatment, and protection systems
Corrective maintenance- damage evaluation, classification, and determination if the damage is with in the authorize limits
O level is limited to
Corrosion inspections, treatment, and protection systems
preventative maintenance
Dammit evaluation, classification, and determination if the damage is within the authorize limits
Corrective maintenance
Three matrixes
Epoxy resins, Bismaleimide resins, and polyamide resins
Used to manufacture complex con toward parts
Fibers and the matrix
