Things To Know Flashcards by Kayla Tuohy

Sae 1st digit

Primary alloying element

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Sae last two digits

Percentage of hundredths of a precentor carbon in steel

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Sae 2XXX

Nickle

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Sae 1020 carbon content

.20%

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Low carbon steel

0.03 - 0.3

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Medium carbon steel

0.3 - 0.8

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High carbon steel

0.8 - 1.4

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The lower Critical Point of all Steel

723deg C

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0.83 carbon steel when heated the Lower and Upper
Critical points converge and is called

Eutectoid point

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After Steel is cold worked, bent, rolled it is

Annealed, Normalised

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Hardening causes Steel to be brittle and is reduced by

Tempering

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Lowest heat treatment

Tempering

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Heat treatment

Annealing-Normalising- Hardening-
Tempering and surface hardening

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Steel that is Forged

Normalizing

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Heat treatment for Steel

hardening, tempering , normalizing

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Heat treatment - Case hardening are

Carburising, Nitriding

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Case hardening hard wear

resistant surface over strong core, tough

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Nitriding

Case hardening

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Carburising

is Case hardening

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Heat treatment

age hardening

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Young’s Modulus tests

Tensile load

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Young’s modulus/ test material resistance

Strain under tensile loads

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High longitudinal modulus of elasticity

Young’s modules

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CRES what group

Austenitic group

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Tensile tests the

Strength of metal

Tensile strength

Stretching material

Hooke’s Law Stress

is directly proportional to Strain

Creep is

When a metal is subject to both Tensile Stress and High Heat over a long period

Fatigue strength test

Repeated Stress Cycles

Fatigue strength test determines

life span of material

Prone to Fatigue

Effects Life Span

What do you measure in the Brinell test

diameter of the impression

Impact resistance test Izod

Toughness

Vickers hardness tester use a

Diamond

To measure Brinell Impression you use

Calibrated Microscope

What point is on Brinell tester

Ball

What point can be on Rockwell hardness tester

Conical Diamond

Aluminium Alloy AA1017 what is the first Digit

Alloy type

AA1017 what is the second Digit

Modification of Alloy

AA1017 Third and Fourth digit.

Percentage of Purity of Aluminium above 99%

AA 5056 Alloy

Magnesium

AA 2024 alloy

copper

AA 3003 alloy

Manganese

7075 Al

Zinc

5052 alloy

Magnesium Can be Welded, High strength, ductile

1100 Pure Aluminium

High electrical conductivity

2117-T3

Solution Heat treatment -cold worked

Solution Heat treatment and Artificial Ageing

2024-T6

Solution heat treated and Precipitation treated

Al solution heat treatment & cold worked

Solution heat treatment and Strain hardening

Slow down Ageing process

Freezing to -20 degree

Solution Heat treatment & Natural ageing

Alclad

Thin layer of pure Al on both sides of 2024-T4

Fuselage skin made from

CLAD 2024-T3

Core material of Alclad 2024-T4

Solution Heat treated Aluminium Alloy/surface pure aluminium

Repeat Annealing will cause

Material to Crack/ less strength

Treatment for non-heat treatable Alloy

Cold working

Skin of Firewall made from

Titanium

Strength of non-heat treatment aluminium increases with.

Strain hardening

Strength of non-heat treatment aluminium increases with

cold Working

In Appearance Titanium is similar to

stainless steel

Aluminium heat treated to specific temperature for a set Time and Quenched is?

Solution Heat Treatment

Pure Aluminium on both surfaces

Process to prevent Corrosion

Failure to Quench Aluminium in time

Impairs Corrosion resistant Qualities

Further name for Precipitation heat treatment.

Artificially aged

Material to Clad Aluminium Alloy

Pure Aluminium

Temper Designation for Aluminium Annealed cold

Metal cannot be heat treated-Hardened by Cold working

Another Term for Artificial aging

Precipitation heat treatment

AA numbering system-second digit

Alloy Modification

Where is Cast Aluminium found on

aircraft Gearbox

Fuselage’s are generally made from

2024-T3

Melting point of Aluminium

660 degree

Where is Aluminium used

Fuselage skin

Nickle-chromium-Iron Alloy used for

Temperature sensing bulbs

Silver Solder melting point

460 deg C

Sintering Bronze used in

small oil retaining Bearings

Solder Tin/Lead 60/40 melting point

187 deg C

Heat treatable Aluminium alloy’s

2,6,7,8 Series

Hooke’s law

Strain is proportional to stress

Tensile strength

Max force divided by cross section area

Strength increase non heatable alloy

cold working

Spherical penetrator used by

Brinell

Impact tester

toughness

Creep

Tensile stress & high temp - long time

Advantage of Epoxy resin

Low Shrinkage and High strength to weight ratio

Temperature moisture should be removed at

150 degree F

What direction is honeycomb replaced

ribbon direction

Information about working on Resin

Material Safety data

Chopped strand Mat

Fibres are short

Pattern of Honeycomb

Hex

Shelf Life

Length of Time Resin is Stored

Curing Agent

Epoxy resin

Load carrying property of Fibre

Fibre Length

Carbon Graphite Fibre

is Stiff-High Compression Strength-Corrode aluminium

Forms of Fibre

Mat-Woven- Strains- Chopped

Glass or Composite Plastic are

Thermosets

Honeycomb Core for Al Nomex Glass – Kevlar

Kevlar

Catalyst in Polyester resin

Aids joining Polyester Modules

Polyester Resin to Cure

Requires Heat

Honeycomb compared to sheet metal Adv.

Rigidity

Micro Balloons added to Epoxy resin

Add Volume-light in weight

Gains of Honeycomb over Soft Metal

Rigidity

Kevlar is strongest

Tension –strength

Dermatitis

Skin contact resin

Honeycomb Core

Nomex

Composites used

Lighter than metal

Increase temperature in cold cure resins

decreases Pot life

Black Composite material

Carbon

Epoxy type

Thermoset

Pot Life

resin Length of time resin remains useable

Nomex honeycomb made from

Resin impregnated synthetic Fibre

Unidirectional weave cloth used when

Strength in one direction

3 properties of Composites

Strength-Stiff- Impact resistance

Chopped strands Mat in woven fabric

Fibres are short

4 types of honeycomb core

Nomex, aluminium, Glassfibre, Kevlar

Water in composite

X Ray

Composite Delamination

Core from Face sheet

Washing Hands

Cold water

Bonding of Composite

Tap test

Damage composite

refer to SRM

Simplest test for delamination

Tap test

Core Material to replace damage honeycomb

Fibreglass

Honeycomb repair test after

tap test

Glue deterioration in wood p158

Glue surface shows wood grain

Decay in wood P3-116

No decay allowed

Faint line running across

Compression failure

Wood used P3-106

Spruce

Moisture content check P3-108

By weight or / and moisture Meter

Moisture content by

weight Weight sample, dry sample and weigh again

Content of moisture P3-108

10% to 15% ± 2%

Glass Fibre susceptible to P3-164

Acid rain

Aircraft fabric fitted what angle to slip stream P3-170

45⁰ or Inline

Tensile bearing strength of cord P3-162

60 lbs

Grade A cotton threads P3 -164

80-84 threads per inch

Anti Blush thinners is added to Dope P3-168

Slow down drying/ prevent condensation

Final or finish coat

Pigmented Dope P3 -179

Blushing a white cast formed on Dope surface P-181

Moisture condensing on uncured dope

Galvanic action P4-10

No porous dielectric material

Fretting corrosion P4-26

2 surfaces fit tightly together

Cyclic stress & corrosion

Fatigue

Smoking rivets P4-26

fretting corrosion

Along the Grain boundaries P-22

Intergranular Corrosion

Fretting P4-26

loose rivet

Worm like under paint P4-30

Filiform Corrosion

Exfoliation corrosion P-24

Extruded or rolled metals section

Worm like P4-30

Filiform Corrosion

Lifting or flaking

Exfoliation

Magnesium

most anodic

Cadmium plated steel bolt in non clad 2024

Cadmium corrodes first

Intergranular corrosion

improperly heat treated

Rivet Grip Length

1/16

Ref 2017/2024

Age hardening

Countersunk rivet

100⁰

Length -5

5/16

“AD” rivet

2117

Dimple

2117

Rivet loads

Shear & tension

Rivet code in box “XC” “6F”

A fluid tight fastener

2117 “AD” rivet

Finished by Manufacture Don’t require heat treatment

2017/2024 in ice

Slows age Harding

2024 use within 10 min otherwise

refrigerate

Rivet 2 raised dashes

2024 (DD) rivet

Rivnuts

used floor and non structure

Rivets must be heated before driving

only reheat 3 times

Rivet no head marking

A 1100

Raised cross

5056

Raised dot

2017 D

raised cross

5056

Primary structure

Pop rivet

Break stem

Pop rivet

Not for structure

Ms20470AD5-4

has a shank 5/32

5056 letter code

Chery Max with Anvil washer on Stem

Anvil washer on Stem

MS20470AD4-7 what type

universal

Hi LocK removed

Oversize shank

Ms20426dd-6-5

shank 5/16

Helical extension/ Tension Spring where those it break

Hook

Helical compression spring uses a

Ground End

High speed control surface has high load

torsional twisting of torque tube

Torsion Spring Bending Stress

Twisting

Helical tension Spring characteristics

Linear

Taper roller

Radial and axial

Fluid Damping

Vibration

Journal

Radial

Heavy Radial

Roller

Needle roller

Small space / limited space

Heat of lubricant removed by

Oil

Fluid Damping

Dynamic Load

Wheel

Taper/Roll

Radial and thrust

Taper/Roll

Material of bearing ball/roller

Hard Steel

Load Ball Bearing

Thrust/Radial

Heavy Radial loads

Roller

Oil Damp bearing

Vibration and high dynamic loads

Pulley attached to Shaft

Keyway

Chain wheel Sprocket

Change Direction

Can Chain Drive in Flight Control be Reversed

Yes - Unless Non-reversible chain

Erase free play in gear train

Shims

Change direction of Drive

Bevel gear

Worn Gear Paton produces

Shows on teeth of Drive gear

Planetary Gear Sun Input

Ring fixed

Helical Gear Produces

Axial Load

Gears

Back lash Required

Woodruff Key

semi Circular recess

Quietest Gear

Helical

Planetary outer gear

Ring

What can Planetary do

Both Increase and Decrease Speed

Idler gear

Idler gear Idler purpose rotate output same as input direction

Ratio of worm gear

diameter of wheel

Sun gear

input ring fixed

Good cable to use on Pulley

7 X 19

predictable angular rotation

chain driven sys

Testing a Swage fitting

100% of cable strength

Excessive wear on pulley walls

Pulley misaligned

Cable 1 X 7

1 strand 7 wires

Cable 1 X 7

Not Flexible

Fairlead

Guide cable through structure

Cable compensator

Holds cable tension under all conditions

New cable - proof load

Pre Stretch cable and check end fitting

Checking tension on cables

Rig pins loose

Solvents in Cable will

Wash out Lubricant

What happens tension on Warm day

Cable Tension increases

Witness hole in Turnbuckle

unable to thread cable through hole

Control cable end terminal are

Swaged fitting

Mechanical linkage through a bulkhead

use Pressure seal

Max threads on turnbuckle exposed

What is a flexible cable

7/19

Test on Swage

100% of cable strength

Fairlead stops deflection of cable up to

3˚

Grove on end of turnbuckle indicates

LH thread side

Post adjustment of turnbuckle

Safety and locked

Clean cables with solvent

Remove’s lubricant internal

Witness hole in push pull rod

enough thread engagement

Fairlead

Protect cable from structure

Crimping tool for tags is

Certi- crimp ratchet type

Single wire type uses aircraft structure as

return path

Class A, B, C, D connector are made from

Aluminium

Cable Part no

Printed on cable

Insulation voltage rating

600V

Terminal strength

full strength of cable

Where are receptacle’s found

On Components- Valve, Actuator

Temp of Tin coated copper cable

105 deg C

Temp of Nickel coated copper cable

250 deg C

Temp of Nickel clad copper cable

250 deg C

Temp of Silver coated copper cable

200 deg C

Electrical cable Fire resistant

5 minutes

Electrical cable Fire proof

15 minutes

Most connectors are now

Crimped

Check fluid level of Hydraulic crimper

Horizontal

Oxide on exposed silver plated cable is

an insulator

Tersil cable Orange

Nickel plated copper fire resistant 190

Fepsil cable replacing Tersil Green

Nickel plated copper fire resistant 190

Silver coated cable is prone to

Red plague

Efglas cable White

Nickel plated copper High temp cable 250

Ignition HT cable

Multi strand, single core, screened

Aluminium cable when flexed.

work harden and embrittlement

Maximum Terminals on Stud

Hot stamped cable are prone to

Wet arc tracking

Position of inline splice on loom

Outside for inspection

Cable Tersil 22-22 refers to

American Wire Gauge size of conductor

Terminal Crimping tools are colour coded

RED, Blue, Yellow

Copper cable compared to Aluminium is

smaller size

Current capacity of 8 AWG Copper cable use

6 AWG Aluminium cable

Allowable Voltage Drop for 28V cable

1 Volt continuous, 2 Volts Intermittent

Considerations in selecting a cable

Current, Voltage Drop, Insulation

Current carrying capacity of cable

AWG

Cable size AWG

Cross sectional area “Circular Mil

Airframe cable

Designed for environment

Coaxial Cable is used for

Transmitting Radio frequencies

Equipment Cables

Flexible and suitable for soldering

Interconnect Cables

Thinner insulation

Coaxial Cable the impedance is

Full length of cable

EGT Probes made from Chromel/ Alumel

Cables attached to Probe/sensor are same material

Cable Code 3135-27B20N

3135 ATA 100 wire number prefix

Cable Code 3135-27B20N

27 Wire Number

Cable Code 3135-27B20N

“B” Segment Letter

Cable Code 3135-27B20N

20 Wire gauge

Cable Code 3135-27B20N

“N” Ground (suffix letter)

Suffix Letter can be

“N” Ground, A,B,C Phase or Thermocouple Material

Cable Code Number X26D-22A

“X” AC power

Cable Code Number X26D-22A

26 Cable number

Cable Code Number X26D-22A

“D” Segment Number

Cable Code Number X26D-22A

“A” Phase A

PIDG Pre- Insulated Diamond Grip Terminals

Colour coded Red, Blue and Yellow

Conductor extend beyond terminal barrel

1/32 inch

Correct indent on Blue Terminal

2 Dots

Terminal bending max radius

30 deg