AC 60-25F

Historical

Advisory circular · Reference Materials and Subject Matter Knowledge Codes for Airman Knowledge Testing

Approved
June 8, 2004
Last reviewed
October 9, 2024
This change
Canceled by Memo signed by Robert C. Carty and Derek Honda; dated 3/2/2021.
Cancels
AC60-25E
Family
AC 60-25 · 3 versions
Revision
F
14 CFR parts
1, 21, 23, 25, 27, 39, 43, 45, 61, 63, 65, 71, 91, 97, 105, 119, 121, 125, 135, 183
14 CFR sections
§ 23.29§ 91.417

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 21, 2025.

Show pages 22–33

O255 Flight Planning O256 Preflight Operations O257 The Standard Burn O258 Inflation O259 Launch O260 Level Flight O261 Ascents and Descents O262 Contour Flying O263 Maneuvering O264 Approach to Landing O265 Landings O266 Deflation O267 The Chase O268 Landowners Relations O269 Recovery and Pack-up O270 Propane: Management and Fueling O271 Tethering O272 Emergency Procedures O273 Skill Development O274 Crew O275 What is a Good Instructor O276 Regulations O277 Maintenance O278 Earning a Pilot Certificate O279 Radio Communications O280 Appendix 1: Glossary Goodyear Airship Operations Manual P01 Buoyancy P02 Aerodynamics P03 Free Ballooning P04 Aerostatics P05 Envelope P06 Car P07 Powerplant P08 Airship Ground Handling P11 Operating Instructions P12 History P13 Training The Parachute Manual—Para Publishing P31 Regulations P32 The Parachute Rigger Certificate P33 The Parachute Loft P34 Parachute Materials P35 Personnel Parachute Assemblies P36 Parachute Component Parts P37 Maintenance, Alteration, and Manufacturing Procedures 34

P38 Design and Construction P39 Parachute Inspecting and Packing P40 Glossary/Index The Parachute Manual, Vol. II—Para Publishing P51 Parachute Regulations P52 The Parachute Rigger’s Certificate P53 The Parachute Loft P54 Parachute Materials P55 Personnel Parachute Assemblies P56 Parachute Component Parts P57 Maintenance, Alteration, and Manufacturing P58 Parachute Design and Construction P59 Parachute Inspection and Packing P60 Appendix P61 Conversion Tables P62 Product/Manufacturer—Index P63 Name and Manufacture—Index P64 Glossary-Index AC 65-9—Airframe and Powerplant Mechanics General Handbook S01 Mathematics S02 Aircraft Drawings S03 Aircraft Weight and Balance S04 Fuels and Fuel Systems S05 Fluid Lines and Fittings S06 Aircraft Hardware, Materials, and Processes S07 Physics S08 Basic Electricity S09 Aircraft Generators and Motors S10 Inspection Fundamentals S11 Ground Handling, Safety, and Support Equipment AC 65-12—Airframe and Powerplant Mechanics Powerplant Handbook S12 Theory and Construction of Aircraft Engines S13 Induction and Exhaust Systems S14 Engine Fuel and Metering Systems S15 Engine Ignition and Electrical Systems S16 Engine Starting Systems S17 Lubrication and Cooling Systems S18 Propellers S19 Engine Fire Protection Systems S20 Engine Maintenance and Operation 35

AC 65-15—Airframe and Powerplant Mechanics Airframe Handbook S21 Aircraft Structures S22 Assembly and Rigging S23 Aircraft Structural Repairs S24 Ice and Rain Protection S25 Hydraulic and Pneumatic Power Systems S26 Landing Gear Systems S27 Fire Protection Systems S28 Aircraft Electrical Systems S29 Aircraft Instrument Systems S30 Communications and Navigation Systems S31 Cabin Atmosphere Control Systems JSGT—A&P Technician General Textbook—Jeppesen Sanderson, Inc.

S32 Mathematics S33 Physics S34 Basic Electricity S35 Electrical Generators and Motors S36 Aircraft Drawings S37 Weight and Balance S38 Fluid Lines and Fittings S39 Aircraft Hardware S40 Corrosion and Its Control S41 Nondestructive Inspection S42 Ground Handling and Servicing S43 Maintenance Forms and Records S44 Maintenance Publications JSPT—A&P Technician Powerplant Textbook—Jeppesen Sanderson, Inc.

S45 Reciprocating Engines S46 Turbine Engines S47 Engine Removal and Replacement S48 Engine Maintenance and Operation S49 Induction and Exhaust Systems S50 Engine Fuel and Fuel Metering S51 Engine Ignition and Electrical Systems S52 Engine Lubrication and Cooling Systems S53 Engine Fire Protection Systems S54 Propellers JSAT—A&P Technician Airframe Textbook—Jeppesen Sanderson, Inc.

S55 Aircraft Structures S56 Assembly and Rigging S57 Aircraft Fabric Covering S58 Aircraft Painting and Finishing S59 Aircraft Metal Structural Repair 36

1 2 3 4 5 6 6/8/04 AC 60-25F S60 Aircraft Wood and Composite Structural Repair S61 Aircraft Welding S62 Ice and Rain Control Systems S63 Hydraulic and Pneumatic Power Systems S64 Aircraft Landing Gear Systems S65 Fire Protection Systems S66 Aircraft Electrical Systems S67 Aircraft Instrument Systems S68 Aircraft Fuel Systems S69 Aircraft Cabin Atmosphere Control Systems AGTP—Aircraft Gas Turbine Powerplants—Jeppesen Sanderson, Inc.

S70 History of Turbine Engine Development S71 Jet Propulsion Theory S72 Turbine Engine Design and Construction S73 Engine Familiarization S74 Inspection and Maintenance S75 Lubrication Systems S76 Fuel Systems S77 Compressor Anti-Stall Systems S78 Anti-Icing Systems S79 Starter Systems S80 Ignition Systems S81 Engine Instrument Systems S82 Fire/Overheat Detection and Extinguishing Systems for Turbine Engines S83 Engine Operation The Aircraft Gas Turbine Engine and Its Operation—United Technologies Corporation, Pratt Whitney, 1988 T01 Gas Turbine Engine Fundamentals T02 Gas Turbine Engine Terms T03 Gas Turbine Engine Components T04 Gas Turbine Engine Operation T05 Operational Characteristics of Jet Engines T06 Gas Turbine Engine Performance Aircraft Powerplants—Glencoe/McGraw-Hill, Seventh Edition T07 Aircraft Powerplant Classification and Progress T08 Reciprocating-Engine Construction and Nomenclature T09 Internal-Combustion Engine Theory and Performance T10 Lubricants and Lubricating Systems T1 Induction Systems, Superchargers, Turbochargers, and Cooling and Exhaust Systems T1 Basic Fuel Systems and Carburetors T1 Fuel Injection Systems T1 Reciprocating-Engine Ignition and Starting Systems T1 Operation, Inspection, Maintenance, and Troubleshooting of Reciprocating Engines T1 Reciprocating-Engine Overhaul Practices 37

T17 Gas Turbine Engine: Theory, Construction, and Nomenclature T18 Gas Turbine Engine: Fuels and Fuel Systems T19 Turbine-Engine Lubricants and Lubricating Systems T20 Ignition and Starting Systems of Gas-Turbine Engines T21 Turbofan Engines T22 Turboprop Engines T23 Turboshaft Engines T24 Gas-Turbine Operation, Inspection, Troubleshooting, Maintenance, and Overhaul T25 Propeller Theory, Nomenclature, and Operation T26 Turbopropellers and Control Systems T27 Propeller Installation, Inspection, and Maintenance T29 Engine Indicating, Warning, and Control Systems ATD—Aircraft Technical Dictionary—Jeppesen Sanderson, Inc.

T30 Definitions Aircraft Basic Science—Glencoe/McGraw-Hill, Seventh Edition T31 Fundamentals of Mathematics T32 Science Fundamentals T33 Basic Aerodynamics T34 Airfoils and their Applications T35 Aircraft in Flight T36 Aircraft Drawings T37 Weight and Balance T38 Aircraft Materials T39 Fabrication Techniques and Processes T40 Standard Aircraft Hardware T41 Aircraft Fluid Lines and their Fittings T42 Federal Aviation Regulations and Publications T43 Ground Handling and Safety T44 Aircraft Inspection and Servicing Aircraft Maintenance and Repair—Glencoe/McGraw-Hill, Sixth Edition T45 Aircraft Structures T46 Aircraft Fluid Power Systems T47 Aircraft Landing-Gear Systems T48 Aircraft Fuel Systems T49 Environmental Systems T50 Aircraft Instruments and Instrument Systems T51 Auxiliary Systems T52 Assembly and Rigging TCAS—Transport Category Aircraft Systems—Jeppesen Sanderson, Inc.

T53 Types, Design Features and Configurations of Transport Aircraft T54 Auxiliary Power Units, Pneumatic, and Environmental Control Systems T55 Anti-Icing Systems and Rain Protection 38

T56 Electrical Power Systems T57 Flight Control Systems T58 Fuel Systems T59 Hydraulic Systems T60 Oxygen Systems T61 Warning and Fire Protection Systems T62 Communications, Instruments, and Navigational Systems T63 Miscellaneous Aircraft Systems and Maintenance Information Aircraft Electricity and Electronics—Glencoe/McGraw-Hill, Fifth Edition T64 Fundamentals of Electricity T65 Applications of Ohm’s Law T66 Aircraft Storage Batteries T67 Alternating Current T68 Electrical Wire and Wiring Practices T69 Electrical Control Devices T70 Electric Measuring Instruments T71 Generators and Related Control Circuits T72 Alternators, Inverters, and Related Controls T73 Electric Motors T74 Power Distribution Systems T75 Design and Maintenance of Aircraft Electrical Systems T76 Radio Theory T77 Communication and Navigation Systems T78 Weather Warning Systems T79 Electrical Instruments and Autoflight Systems T80 Digital Electronics FAA Accident Prevention Program Bulletins V01 FAA-P-8740-2, Density Altitude V02 FAA-P-8740-5, Weight and Balance V03 FAA-P-8740-12, Thunderstorms V04 FAA-P-8740-19, Flying Light Twins Safely V05 FAA-P-8740-23, Planning your Takeoff V06 FAA-P-8740-24, Tips on Winter Flying V07 FAA-P-8740-25, Always Leave Yourself an Out V08 FAA-P-8740-30, How to Obtain a Good Weather Briefing V09 FAA-P-8740-40, Wind Shear V10 FAA-P-8740-41, Medical Facts for Pilots V11 FAA-P-8740-44, Impossible Turns V12 FAA-P-8740-48, On Landings, Part I V13 FAA-P-8740-49, On Landings, Part II V14 FAA-P-8740-50, On Landings, Part III V15 FAA-P-8740-51, How to Avoid a Midair Collision V16 FAA-P-8740-52, The Silent Emergency 39

FTP—Flight Theory for Pilots—Jeppesen Sanderson, Inc.

W01 Introduction W02 Air Flow and Airspeed Measurement W03 Aerodynamic Forces on Airfoils W04 Lift and Stall W05 Drag W06 Jet Aircraft Basic Performance W07 Jet Aircraft Applied Performance W08 Prop Aircraft Basic Performance W09 Prop Aircraft Applied Performance W10 Helicopter Aerodynamics W11 Hazards of Low Speed Flight W12 Takeoff Performance W13 Landing Performance W14 Maneuvering Performance W15 Longitudinal Stability and Control W16 Directional and Lateral Stability and Control W17 High Speed Flight Fly the Wing—Iowa State University Press/Ames, Second Edition X01 Basic Aerodynamics X02 High-Speed Aerodynamics X03 High-Altitude Machs X04 Approach Speed Control and Target Landings X05 Preparation for Flight Training X06 Basic Instrument Scan X07 Takeoffs X08 Rejected Takeoffs X09 Climb, Cruise, and Descent X10 Steep Turns X11 Stalls X12 Unusual Attitudes X14 Maneuvers At Minimum Speed X15 Landings: Approach Technique and Performance X16 ILS Approaches X17 Missed Approaches and Rejected Landings X18 Category II and III Approaches X19 Nonprecision and Circling Approaches X20 Weight and Balance X21 Flight Planning X22 Icing X23 Use of Anti-ice and Deice X24 Winter Operation X25 Thunderstorm Flight X26 Low-Level Wind Shear 40

Aircraft Gas Turbine Engine Technology—Glencoe/McGraw-Hill, Second Edition Y01 History and Theory Y02 Construction and Design Y03 Systems and Accessories Y04 Maintenance and Testing Y05 Representative Engines Y06 Appendixes Technical Standard Orders Y60 TSO-C23b, Parachute Y61 TSO-C23c, Personnel Parachute Assemblies Y62 TSO-C23d, Personnel Parachute Assemblies Type Certificate Data Sheets and Specifications Y300 Type Certificate Data Sheets and Specifications Alphabetical Index and Users Guide Y301 Type Certificate Data Sheet No. 2A13 Piper Y302 Type Certificate Data Sheet No. 3A19 Cessna Y303 Type Certificate Data Sheet No. E-295 Lycoming Y304 Type Certificate Data Sheet No. A7CE Cessna Y305 Type Certificate Data Sheet No. 3A13 Cessna Y306 Type Certificate Data Sheet No. A7S0 Piper Y307 Type Certificate Data Sheet No. A11EA Gulfstream American Y308 Type Certificate Data Sheet No. E-273 Continental Y309 Aircraft Specification No. 1A6 Piper Y310 Type Certificate Data Sheet No. P57GL McCauley Y311 Type Certificate Data Sheet No. P920 Hartzell Y312 Type Certificate Data Sheet No. 2A4 Twin Commander Y313 Type Certificate Data Sheet No. E-284 Textron Lycoming Practical Test Standards Z01 FAA-S-8081-6, Flight Instructor Practical Test Standards for Airplane Z02 FAA-S-8081-7, Flight Instructor Practical Test Standards for Rotorcraft Z03 FAA-S-8081-8, Flight Instructor Practical Test Standards for Glider NOTE: AC 00-2, Advisory Circular Checklist, transmits the status of all FAA advisory circulars (ACs), as well as FAA internal publications and miscellaneous flight information, such as Aeronautical Information Manual, Airport/Facility Directory, knowledge test guides, practical test standards, and other material directly related to a certificate or rating. The checklist is available on the Internet at:

http://www.faa.gov/aba/html_policies/ac00_2.html 41

LIST OF REFERENCE MATERIALS

AND SUBJECT MATTER KNOWLEDGE CODES The publications listed in the following pages contain study material you need to be familiar with when preparing for aviation mechanic knowledge tests. These publications can be purchased through the U.S.

Government Printing Office (GPO), commercial aviation supply houses, or industry organizations. The latest revision of the listed references should be requested. Additional study material is also available through these sources that may be helpful in preparing for aviation mechanic knowledge tests. All publications listed would be excellent for a mechanic to have in a personal reference library.

AVIATION MECHANIC—GENERAL

ABBREVIATIONS AND REFERENCES AMT-G Aviation Maintenance Technician Series General—Aviation Supplies and Academics (ASA), Inc.

ABS Aircraft Basic Science—Glencoe Division, Macmillan/McGraw-Hill Publication Co.

AP Aircraft Powerplants—Glencoe Division, Macmillan/McGraw-Hill Publication Co.

AEE Aircraft Electricity and Electronics—Glencoe Division, Macmillan/McGraw-Hill Publication Co.

AC Advisory Circular—Federal Aviation Administration (FAA), Government Printing Office (GPO) AIM Aeronautical Information Manual—FAA, Government Printing Office (GPO) 14 CFR Title 14 of the Code of Federal Regulations (part or § [section])—Government Printing Office (GPO) FAA-G-8082 Guide—FAA, Government Printing Office (GPO) FAA-H-8083 Handbook—FAA, Government Printing Office (GPO) MBM Marathon Battery Instruction Manual ECD Electronic Circuit Devices—Jeppesen Sanderson, Inc.

AB Aircraft Batteries, Lead Acid/Nickel-Cadmium—Jeppesen Sanderson, Inc.

ATD Aircraft Technical Dictionary—Jeppesen Sanderson, Inc.

JSGT A & P Technician General Textbook—Jeppesen Sanderson, Inc.

JSPT A & P Technician Powerplant Textbook—Jeppesen Sanderson, Inc.

Basic Electricity—AC 65-9A, AMT-G, AEE, MBM, ECD, AB, JSGT A01 Calculate and measure capacitance and inductance A02 Calculate and measure electrical power A03 Measure voltage, current, resistance, and continuity A04 Determine the relationship of voltage, current, and resistance in electrical circuits A05 Read and interpret electrical circuit diagrams, including solid state devices and logic functions A06 Inspect and service batteries Aircraft Drawings—AC 65-9A, AC 65-15A, ABS, JSGT B01 Use drawings, symbols, and system schematics B02 Draw sketches of repairs and alterations B03 Use blueprint information B04 Use graphs and charts 42

Weight and Balance—AC 65-9A, 14 CFR § 23.29 C01 Weigh aircraft C02 Perform complete weight and balance check and record data Fluid Lines and Fittings—AC 65-9A, ABS, JSGT D01 Fabricate and install rigid and flexible fluid lines and fittings Materials and Processes—AC 65-9A, AC 43-3, AC 65-15A, AC 43.13-1B, ABS, AP , ATD, JSPT, JSGT E01 Identify and select appropriate nondestructive testing methods E02 Perform dye penetrant, eddy current, ultrasonic, and magnetic particle inspections E03 Perform basic heat-treating processes E04 Identify and select aircraft hardware and materials E05 Inspect and check welds E06 Perform precision measurements Ground Operation and Servicing—AC 65-9A, FAA-H-8083-3, AC 65-12A, AIM, ABS, JSGT F01 Start, ground operate, move, service, and secure aircraft and identify typical ground operation hazards F02 Identify and select fuels Cleaning and Corrosion Control—AC 65-9A, AC 65-12A, AC 43.13-1B, AC 43-4A, AC 43-205, JSGT G01 Identify and select cleaning materials G02 Inspect, identify, remove, and treat aircraft corrosion and perform aircraft cleaning Mathematics—AC 65-9A, AC 65-12A, ABS, AMT-G, JSGT H01 Extract roots and raise numbers to a given power H02 Determine areas and volumes of various geometrical shapes H03 Solve ratio, proportion, and percentage problems H04 Perform algebraic operations involving addition, subtraction, multiplication, and division of positive and negative numbers Maintenance Forms and Records—AC 61-23C, AC 65-9A, AC 65-19H, AC 43.13-1B, 14 CFR §

91.417, 14 CFR part 43 I01 Write descriptions of work performed including aircraft discrepancies and corrective actions using typical aircraft maintenance records I02 Complete required maintenance forms, records, and inspection reports Basic Physics—AC 65-9A, FAA-H-8083-3, ABS, JSGT J01 Use and understand the principles of simple machines; sound, fluid, and heat dynamics; basic aerodynamics; aircraft structures; and theory of flight 43

Maintenance Publications—AC 65-9A, FAA-G-8082-11, 14 CFR part 21, 14 CFR part 39, 14 CFR part 43, ABS, JSGT K01 Demonstrate ability to read, comprehend, and apply information contained in FAA and manufacturer’s aircraft maintenance specifications, data sheets, manuals, publications, and related Federal Aviation Regulations, Airworthiness Directives, and Advisory material K02 Read technical data Mechanic Privileges and Limitations—AC 43.13-1B, AMT-A, 14 CFR part 43, 14 CFR part 65 L01 Exercise mechanic privileges within the limitations prescribed by 14 CFR part 65 AVIATION—MECHANIC AIRFRAME

ABBREVIATIONS AND REFERENCES AC Advisory Circular AEE Aircraft Electricity and Electronics—Glencoe Division, Macmillan/McGraw-Hill Publication Co.

AMR Aircraft Maintenance and Repair—Glencoe Division, Macmillan/McGraw-Hill Publishing Co.

AP Aircraft Powerplants—Glencoe Division, Macmillan/McGraw-Hill Publishing Co.

AMT-A Aviation Maintenance Technician Series Airframe—Aviation Supplies and Academics (ASA) Publications DAT Dictionary of Aeronautical Terms—Aviation Supplies and Academics (ASA) Publications AAC Aircraft Air Conditioning (Vapor Cycle)—Jeppesen Sanderson, Inc.

FMS Aircraft Fuel Metering Systems—Jeppesen Sanderson, Inc.

AHS Aircraft Hydraulic System—Jeppesen Sanderson, Inc.

AOS Aircraft Oxygen Systems—Jeppesen Sanderson, Inc.

JSAT A & P Technician Airframe Textbook—Jeppesen Sanderson, Inc.

JSGT A & P Technician General Textbook—Jeppesen Sanderson, Inc.

ABS Aircraft Bonded Structure—Jeppesen Sanderson, Inc.

WG Welding Guidelines with Aircraft Supplement—Jeppesen Sanderson, Inc.

ARS Aircraft Radio Systems—Jeppesen Sanderson, Inc.

AC Advanced Composites—Jeppesen Sanderson, Inc.

14 CFR Title 14 of the Code of Federal Regulations (part or § [section])—Government Printing Office (GPO) 47 CFR Title 47 of the Code of Federal Regulations (part or § [section])—Government Printing Office (GPO) 49 CFR Title 49 of the Code of Federal Regulations (part or § [section])—Government Printing Office (GPO) MBM Marathon Battery Manual MMM Manufacturer’s Maintenance Manual TSO Technical Standard Order SUND Sundtrand IDG and BITE 767 Line Maintenance/Servicing 44

Wood Structures—AC 65-15A, AC 43.13-1B, AMR A01 Service and repair wood structures A02 Identify wood defects A03 Inspect wood structures Aircraft Covering—AC 65-15A, AC 43.13-1B, AMR B01 Select and apply fabric and fiberglass covering materials B02 Inspect, test, and repair fabric and fiberglass Aircraft Finishes—AC 65-15A, AC 43.13-1B, AMR, JSAT C01 Apply trim, letters, and touchup paint C02 Identify and select aircraft finishing materials C03 Apply finishing materials C04 Inspect finishes and identify defects Sheet Metal and Non-Metallic Structures—AC 65-9A, AC 65-15A, AC 43.13-1B, 14 CFR part 23, TSO, AMR, AComp, ABStruc, JSGT, JSAT D01 Select, install, and remove special fasteners for metallic, bonded, and composite structures D02 Inspect bonded structures D03 Inspect, test, and repair fiberglass, plastics, honeycomb, composite, and laminated primary and secondary structures D04 Inspect, check, service, and repair windows, doors, and interior furnishings D05 Inspect and repair sheet-metal structures D06 Install conventional rivets D07 Form, lay out, and bend sheet metal Welding—AC 65-15A, AC 43.13-1B, AMR, WG, JSAT E01 Weld magnesium and titanium E02 Solder stainless steel E03 Fabricate tubular structures E04 Solder, braze, gas-, and arc-weld steel E05 Weld aluminum and stainless steel Assembly and Rigging—AC 65-9A, AC 65-15A, AC 61-13B, AC 43.13-1B & 2A, 14 CFR part 23,

AMR, JSAT F01 Rig rotary-wing aircraft F02 Rig fixed-wing aircraft F03 Check alignment of structures F04 Assemble aircraft components, including flight control surfaces F05 Balance, rig, and inspect movable primary and secondary flight control surfaces F06 Jack aircraft 45