AMT ACS Recommendations
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Section I:General
(A)Basic Electricity
The applicant demonstrates understanding of:
(1)Electron theory
(2)Magnetism
(3)Capacitance in a circuit
(4)Inductance in a circuit
(5)AC electrical circuits
(6)DC electrical circuits
(7)Ohm's law
(8)Kirchhoff's law(s)
(9)Voltage
(10)Current
(11)Resistance
(12)Power
(13)Series circuits
(14)Parallel circuits
(15)Aircraft batteries
(16)Transformers
(17)Circuit continuity
(18)Controlling devises including switches and relays
(19)Protective devices including fuses and circuit breakers
(20)Resistor types and color coding
(21)DC motors
(22)AC motors
(23)Semiconductors including diodes, transistors and integrated circuits
(24)Digital logic, including RAM, ROM, NVRAM, AND-gate, OR-gate, Inverter, Flip-flop
(25)Digital numbers
(26)Introduction to troubleshootingprocess
(27)Electrostatic discharge
(28)Electrical circuit drawings
The applicant demonstrates the skill to perform, as a minimum, one of the following elements:
(1)Perform circuit continuity test
(2)Measure voltage
(3)Measure current
(4)Measure resistance
(5)Calculate power
(6)Calculate capacitance and/or inductance
(7)Test a switch or relay
(8)Test a fuse or circuit breaker
(9)Read and interpret aircraft electrical circuit diagrams, symbols, including solid state devices and logic functions
(10)Troubleshoot a circuit
(11)Inspect and service an aircraft battery and compartment
(12)Symbols used in electrical and electronic schematic diagrams, such as grounds, shields, resistors, capacitors, fuses, circuit breakers, batteries, diodes, transistors, and integrated circuits
The applicant identifies, assesses and mitigates risks, encompassing:
(1)Safety factors involved in taking voltage, current, resistance and capacitance measurements
(2)Handling and storage of different type batteries. i.e. lead acid, NiCad, lithium ion, gel cell, etc.
(3)Safety factors when dealing with high-voltage circuits such as found in strobe lighting
(4)Determine or measure for open electrical circuits
(5) Measure voltage drop across a resistor
(B)Aircraft Drawing
The applicant demonstrates understanding of:
(1)Drawings, blueprints, sketches and/or system schematics including commonly used lines, symbols and terminology
(2)Repair or alteration of an aircraft system or component(s) using drawings/blueprints and/or system schematics
The applicant demonstrates skill to perform, as a minimum, one of the following elements:
(1)Draw a sketch of a major repair or alteration
(2)Identify the meaning of lines and symbols used in an aircraft drawing
(3)Interpret dimensions used in an aircraft drawing
(4)Identify changes on an aircraft drawing
(5)Determine material requirements from an aircraft drawing
(6)Troubleshoot an aircraft system or component using an aircraft drawing
(7)Inspect an aircraft system or component using an aircraft drawing
(8)Maintain an aircraft system or component using an aircraft drawing
(9)Interpret graphs and charts
The applicant identifies, assesses and mitigates risks, encompassing:
(1)Plus or minus tolerances as depicted on aircraft drawings
(2)Use of manufactures specifications for design of alterations and repairs
(C)Weight and Balance
The applicant demonstrates understanding of:
(1)Commonly used terminology such as datum, arm, moment (positive or negative), tare, ballast, and residual fuel/oil
(2)Purpose of weighing or reweighing an aircraft
(3)Weighing procedures
(4)Purpose and application of mean aerodynamic chord
(5)Procedures for calculation of the following: arm, moment (positive or negative), center of gravity (CG) or moment index
(6)Relationship of airplane CG to the center of lift
(7)Adverse loading considerations
(8)Determine proper empty weight configuration
Demonstrates skill to perform, as a minimum, one of the following elements:
(1)Identify procedures for and walk-through steps for weighing an aircraft
(2)Perform weight and balance calculations
(3)Calculate ballast/weight shift
(4)Check aircraft weighing scales for calibration
(5)Calculate weight and balance data for an aircraft after an equipment change
(6)Compute forward and aft loaded CG
(7)Determine a location for permanent ballast to bring an aircraft back into balance
(8)Create a maintenance record for a weight and balance change
(9)Compute the amount of fuel needed for weight and balance computations
(10)Record scale readings from a weighed aircraft
(11)Computer lateral CG for a helicopter
(12)Calculate the moment of an item of equipment
(13)Identify tare items
(14)Locate weight and balance information
(15)Locate datum
(16)Locate the baggage compartment placarding requirements for an aircraft
(17)Revise an aircraft equipment list after equipment change
(18)Determine the weight and location of required ballast
(19)Calculate the change needed to correct an overweight or out of balance condition
The applicant identifies, assesses and mitigates risks, encompassing:
(1)Situations that can lead tounsafe conditions when jacking an aircraft; i.e.jacking the aircraft in an area that is susceptible to wind gusts
(2)Dangers of weighing an aircraft without following recommended procedures
(3)Improper use of scales
(4)Adverse loading considerations
(D)Fluid Lines and Fittings
The applicant demonstrates understanding of:
(1)Tubing and hose materials
(2)Tubing and hose applications
(3)Tubing and hose sizes
(4)Tubing and hose fittings
(5)Flexible hose identification
(6)Rigid line fabrication techniques/practices
(7)Rigid line installation techniques/practices
(8)Flexible hose fabrication techniques/practices
(9)Flexible hose installation techniques/practices
Demonstrates skill to perform, as a minimum, one of the following elements:
(1)Fabricate an aircraft tube
(2)Install an aircraft tube
(3)Install an aircraft hose
(4)Perform a tubing or hose inspection
(5)Identify installation and security requirements for tubing and hose
(6)Identify fluid and air lines and fittings
(7)Fabricate a flare on tubing
(8)Install a flareless-fitting-tube connection
The applicant identifies, assesses and mitigates risks, encompassing:
(1)Proper system configuration prior to and during maintenance. i.e. all pressures depleted and system tagged prior to disassembly or maintenance
(2)Proper use of required safety equipment and gear
(3)Use of FAA-approved materials and components
(4)Avoiding twisting when installing flexible fluid hoses
(5)Importance of using a torque wrench when securing fluid hose and line fittings
(6)Use of torque seal or similar witness techniques after installing critical fluid hose and line fittings
(E)Materials, Hardware and Processes
The applicant demonstrates understanding of:
(1)Materials commonly used in aircraft and their general application
(2)Heat treatment, using DD or “icebox” rivets
(3)Forces placed on aircraft materials
(4)Hardware commonly used in aircraft including bolts, nuts, screws, pins, washers, turnlock fasteners, cables, cable fittings, and rigid line couplings
(5)Safety wire and safety clip requirements and techniques
(6)Precision measurement and precision measurement tools, principles and procedures
(7)Visible characteristics of acceptable and/or unacceptable welds
(8)Which non-destructive testing methods are appropriate for various materials
(9)Use of torque wrenches
(10)Wet vs. dry torque
(11)Running vs. breakaway torque
Demonstrates skill to perform, as a minimum, one of the following elements:
(1)Install safety wire on nuts, bolts, turnbuckles and airframe or engine components
(2)Properly torque aircraft hardware
(3)Perform a visual inspection of various welds
(4)Identify different kinds of aircraft materials and hardware
(5)Select and install aircraft bolts
(6)Make precision measurements with a micrometer that has a vernier scale
(7)Check the alignment of a shaft
(8)Identify aircraft control cable part number
(9)Fabricate a cable assembly using a swaged end fitting
(10)Select the correct aluminum alloy for a structural repair
(11)Identify rivets by physical characteristics
(12)Determine suitability of materials for aircraft repairs
(13)Distinguish between heat-treated and non-heat-treated aluminum alloys
(14)Determine required torque value of given item
(15)Check for proper calibration of a micrometer
(16)Identify proper installation procedures for a seal, backup ring, and/or gasket
The applicant identifies, assesses and mitigates risks, encompassing:
(1)The proper use personal protective equipment (PPE)
(2)Suitability and compatibility of materials and hardware to be used for a repair or an alteration
(3)Consequences of improper torque
(4)Inspection of threaded fasteners for damaged threads or damaged cadmium plating
(5)Relationship between torque and fastener preload
(6)Misunderstanding and misapplication of torqueing techniques on critical highly-stressed fasteners
(7)Parts precautions
(F)Ground Operation and Servicing
The applicant demonstrates understanding of:
(1)Aircraft towing procedures
(2)Aircraft securing procedures
(3)Types of aviation fuel
(4)Aviation fuelingprocedures
(5)Airport operation procedures
(6)Starting, ground operating, and/or taxiing procedures
(7)Types/classes of fire extinguishers and procedures
(8)Aircraft oil, hydraulic and pneumatic, deicing etc. servicing procedures
(9)Oxygen system servicing procedures
(10)Characteristics of aviation gasoline and/or turbine fuels, including basic types and means of identification
(11)Fuel additives commonly used in the field
(12)Use of automobile fuel in aircraft engines
(13)Select an approved fuel for an aircraft
(14)Locate jacking procedures
(15)Locate jacking points
Demonstrates skill to perform, as a minimum, one of the following elements:
(1)Identify procedures for and walk-through steps to secure an aircraft
(2)Identify procedures for and walk-through steps to tow an aircraft
(3)Follow a start-up checklist for an aircraft reciprocating or turbine engine
(4)Prepare an aircraft for engine starting
(5)Use appropriate hand signals for the movement of aircraft
(6)Identify procedures for and walk-through steps to fuel an aircraft
(7)Determine the remaining amount of fuel in an aircraft
(8)Inspect an aircraft fuel system for water contamination
(9)Walk-through the procedures for extinguishing fires in an engine induction system during starting
(10)Connect an external auxiliary power unit
(11)Identify different grades of aviation gasoline
(12)Identify procedures for and walk-through steps to secure a helicopter for high-wind conditions
(13)Identify procedures for and walk-through steps to secure a turbine-powered aircraft after engine shutdown
(14)Location jacking points
The applicant identifies, assesses and mitigates risks, encompassing:
(1)Dangers associated with starting, ground operating, and/or taxiing aircraft and procedures for preventing, minimizing or otherwise managing any of them
(2)Fuel contamination hazards
(3)Dangers associated with misfueling an aircraft
(4)Dangers associated with starting a turbine aircraft engine and engine run-up
(5)Oxygen system safety practices/precautions
(6)Cautions involved in preparing to tow an aircraft. i.e. brakes, clearance for large aircraft, etc.
(7)Ground operations of piston aircraft engines with cowling removed
(8)Risks associated with high-power and extended low-power ground operations of piston aircraft engines (when they have little or no cooling airflow)
(G)Cleaning and Corrosion Control
The applicant demonstrates understanding of:
(1)Aircraft washing procedures
(2)Corrosion theory
(3)Types and effects of corrosion
(4)Corrosion causation
(5)Corrosion prone areas in aircraft
(6)Corrosion preventive maintenance procedures
(7)Corrosion identification and inspection
(8)Corrosion removal and treatment procedures
(9)Various kinds of Corrosion Preventive Compounds (CPCs), such as waxy sealants, thin-film dielectrics, etc.
(10)Selection of optimal CPCs
(11) Frequency of CPC treatment
Demonstrates skill to perform, as a minimum, one of the following elements:
(1)Perform a portion of an aircraft corrosion inspection
(2)Identify and select aircraft finishing materials
(3)Apply finishing materials
(4)Inspect finishes and identify defects
(5)The use of high-pressure application equipment (“fogging”) for optimal application for modern thin-film dielectric CPCs
The applicant demonstrates the ability to identify, assess and mitigate risks,encompassing:
(1)Improper use of cleaners on aluminum or composite materials
(2) Dissimilar metals causing accelerated corrosion, and role of things like cadmium plating to mitigate this risk
(3)Improper use or lack of use of appropriate PPE when handling solvents
(H)Mathematics
The applicant demonstrates understanding of:
(1)Areas of various geometrical shapes
(2)Volumes of various geometrical shapes
(3)Definitions/descriptions of geometrical terms, including but not limited to any of the following: polygon, pi, diameter, radius, and hypotenuse
(4)Ratio problems, including examples of where or how they may be used in relation to aircraft maintenance or system(s) operation
(5)Proportion problems, including examples of where or how they may be used in relation to aircraft maintenance or system(s) operation
(6)Percentage problems, including examples of where or how they may be used in relation to aircraft maintenance or system(s) operation
(7)Algebraic operations, including examples of where or how they may be used in relation to aircraft maintenance
(8)Conditions or areas where metric conversion may be necessary
(9)Scientific (exponential) notation, decimal notation, fractional notation, and conversion between these various forms of numeric notation
(10)Precision and rounding
Demonstrates skill to perform, as a minimum, one of the following elements:
(1)Determine the square root of given numbers
(2)Compute the volume of a cylinder
(3)Compute the area of a wing
(4)Calculate the volume of a shape; such as a baggage compartment or fuel tank
(5)Convert fractional numbers to decimal equivalents
(6)Compare two numerical values using ratios
(7)Compute compression ratio
(8)Add, subtract, multiply, and/or divide positive and negative numbers
(9)Compute the least common denominator of two or more fractions
(10)Compute the torque value change when using a torque wrench with an extension
(11)Convert between binary and decimal numerical forms
The applicant identifies, assesses and mitigates risks, encompassing
(1)Failure to use the standard order of operation when solving an algebraic equation
(2)Failure to maintain the correct positive or negative integer in mathematical operations
(3)Inadequate precision when doing calculations
(I)Regulations and Recordkeeping
The applicant demonstrates understanding of:
(1)Privileges and limitations of a mechanic certificate
(2)Recent experience requirements and how to re-establish once lost
(3)Meaning of approval for return to service after repairs and/or alterations
(4)Meaning of approval for return to service after inspection
(5)The use of FAA maintenance recordkeeping forms (e.g., FAA Forms 337, 8010-4, 8100-2, 8050-3 and 8130-3)
(6)Maintenance terminology as defined in 14 CFR part 1 (e.g. time in service, maintenance, preventive maintenance, major alteration, major repair, minor alteration and minor repair)
(7)Criteria for determining whether a repair or alteration is major or minor
(8)The regulatory framework including general subject matter of the relevant parts of 14 CFR
(9)Agency publications and guidance materials including type certificate data sheets (TCDS), advisory circulars and airworthiness directives
(10)Manufacturer publications including maintenance manuals, service bulletins, maintenance alerts and master minimum equipment list
(11)FAA databases and resources available including type certificate data sheets and supplemental type certificates
(12)TCDS non-regulatory and non-compulsory status
(13)Compliance with service bulletins are not compulsory for part 91 operators, even so-called “mandatory” service bulletins, unless mandated by an Airworthiness Directive
(14)Intervals (inspection, replacement, overhaul) in the maintenance manual are NOT compulsory unless included in an FAA-approved Airworthiness Limitations section of the MM
(15)Methods, techniques and practices in the maintenance manual are acceptable but NOT compulsory, and alternative acceptable methods, techniques and practices may be used
(16)Compliance with the overhaul manual is required if a repair is documented as an “overhaul” but is not required if it is documented as a “repair”
(17)Compliance with ICA follow the same rules as for MM. Intervals (inspection, replacement, overhaul) in ICA are NOT compulsory unless included in an FAA-approved Airworthiness Limitations section of the ICA. Methods, techniques and practices in the ICA are acceptable but NOT compulsory, and alternative acceptable methods, techniques and practices may be used
(18)Records content, form, and disposition requirements for major repairs and/or major alterations
Demonstrates skill to perform, as a minimum, one of the following elements:
(1)Complete FAA Form 337 or 8130-3 based on a given set of facts (e.g., 100-hour inspection, serviceable part installation, applicable airworthiness directive, applicable service bulletin, etc.)
(2)Check accuracy of a completed FAA Form 337 or 8130-3
(3)Determine aircraft airworthiness by examining maintenance record entries
(4)Prepare a master airworthiness directives list for a specific airframe, engine and/or propeller and determine applicability by make, model, and serial number
(5)Create a current equipment list for an aircraft, listing all equipment installed
(6)Locate applicable FAA aircraft specifications and/or FAA type certificate data sheet for an aircraft or component
(7)Determine an aircraft’s CG range using aircraft specifications and type certificate data sheets
(8)Locate aircraft flight control travel limits
(9)Determine applicability of an airworthiness directive
(10)Check a technical standard order part for the proper markings
(11)Use a manufacturer’s illustrated parts catalog to locate a specific part number
(12)Locate supplemental type certificates applicable to a specific aircraft
(13)Determine the conformity of aircraft instrument range markings and/or placarding
(14)Determine approved tires for installation on a given aircraft
(15)Determine maximum allowable weight of a specific aircraft
(16)Determine whether a given repair or alteration is major or minor
(17)Locate mechanic address change notification procedures
(18)Lookup applicable CFR section(s) that answers questions posed regarding FAA mechanic privileges and limitations
(19)Determine whether manufacturer’s service instructions are required by regulation or not
(20)List the various sources of approved data and of acceptable data
(21)Explain the difference in requirements for a major repair/alteration and a minor repair/alteration
(22)Explain the difference between “approved data” (required for major repair/alteration) and “acceptable data” (required for minor repair/alteration)
The applicant identifies, assesses and mitigates risks, encompassing:
(1)Hazards that can result from incomplete or inaccurate documentation
(2)Use of Material Safety Data Sheets (MSDS)
(3)Inoperative equipment
(4)Discrepancy records or placards
(5)The use of useable on codes in parts manuals
(6)Determining the serial number effectivity of an item
(7)Limitations of a certificate and/or rating
(8)Understanding recency of experience
(J)Aviation Physics
The applicant demonstrates understanding of:
(1)Matter and energy
(2)Work, power, force and motion
(3)Heat and pressure
(4)Gas law and fluid mechanics
(5)Theory of flight (aerodynamics)
(6)Atmospheric conditions
(7)Bernoulli’s principle and Newtonian law
(8)Density altitude
(9)Aircraft flight controls
(10)Aerodynamic aids including vortex generators, wing fences, and stall strips