| A/C | Aircraft |
| A&P | Airframe And Powerplant |
| a/l | Airline |
| A/P | Autopilot |
| ACJS | Advisory Circular Joints |
| AD | Airworthiness Directive |
| ADO | Approved Design Organisation |
| AGNA | Advisory Group Of National Authorities |
| AMC | Acceptable Means of Compliance |
| AMM | Aircraft Maintenance Manual |
| AMO | Approved Maintenance Organisation |
| AMOSS | Airline Maintenance And Operation Support System |
| AMS | A/C Material Specifications |
| AMT | Approved Maintenance Training |
| AN | Army-Navy Or Airforce-Navy Standards |
| ANS | Air Navigation System |
| AOC | Air Operators Certificate |
| A-NPA | Advance Notice Of Proposed Amendment |
| AOG | Aircraft on Ground |
| APU | Auxiliary Power Unit |
| ARC | Airworthiness Review Certificate |
| AS | Aerospace Standards |
| ASB | Alert Service Bulletin |
| ASL | Above Sea Level |
| ATA | Air Transport Association |
| ATE | Automatic Test Equipment |
| ATFL | Aircraft Technical Flight Log |
| ATM | Air Traffic Management |
| AVL | Approved Vendor List |
| AWM | A/C Wirings Manual |
| BR | Basic Regulation |
| BS | Batchelor of Science |
| C.A.A | Civil Aviation Authority |
| C.A.O | Civil Aviation Organisation |
| CAME | Continuous Airworthiness Maintenance Exposition |
| CAMO | Continuing Airworthiness Management Organisation |
| CAR | Corrective Action Request |
| CDL | Configuration Deviation List |
| CF | Certification |
| CG | Centre of Gravity |
| CM | Condition Monitoring |
| CML | Cabin Maintenance Log Book |
| CMM | Component Maintenance Manual |
| CO | Component Order |
| CofA | Certificate Of Airworthiness |
| COSL | Component Operating And Storage Limits |
| CPCP | Corrosion Prevention And Control Program |
| CRD | Comment Response Document |
| CRI | Certification Review Item |
| CRS | Certificate of Release To Service |
| CS | Certification Specification |
| CSN | Cycle Since New |
| CSO | Cycle Since Overhaul |
| CSP | Certification Standardisation Panel |
| CT | Critical Task |
| CUFT | Cubic Feet |
| DGAC | Director General De’l Aviation Civile |
| DIN | Deutsche Institute For Norming |
| DMD | Deputy Managing Director |
| DOT | Department Of Transportation |
| E | Engine |
| E&E | Electric And Electronic |
| E&M | Engineering And Maintenance |
| EA | Engineering Authorization |
| EASA | European Aviation Safety Agency |
| EC | European Commission |
| ECAC | European Civil Aviation Conference |
| ECAR | European Civil Aviation Requirement |
| ELA | European Light Aircraft |
| EO | Engineering Order |
| EPA | European Part Approval |
| EPR | Environmental Protection Requirements |
| ER | Essential Requirements |
| ETOPS | Extended-range Twin-engine Operational Performance Standards |
| ETSO | European Transmission System Operators |
| EU | European Union |
| FAA | Federal Aviation Administration |
| FAR | Federal Aviation Regulations |
| FCL | Flight Crew Licensing |
| GA | General Aviation |
| GM | Guidance Material |
| GMT | Greenwich Mean Time |
| GSAC | Groupement Pour La Securite De L’aviation Civile |
| GSE | Ground Support Equipment |
| HF | Human Factor |
| HSI | Hot Section Inspection |
| I.A.W | In Accordance With |
| IATA | International Air Transport Association |
| IATP | International Airline Technical Pool |
| ICAO | International Civil Aviation Organisation |
| IEEE | International Electric & Electronic Engineering |
| IOSA | IATA Operational Safety Audit |
| IPC | Illustrated Parts Catalog |
| IR | Implementing Rules |
| ISO | International Standardization Organisation |
| JAA | Joint Aviation Authorities |
| JAR | Joint Aviation Requirements |
| JIC | Job Instruction Card |
| LEP | List of Effective Pages |
| LLP | Life Limited Parts |
| LM | Lead Mechanic |
| LoA | Letter of Agreement |
| LRU | Line Replaceable Unit |
| LSA | Light Sport Aeroplane |
| M/S | Maintenance Schedule |
| MAINT | Maintenance |
| MECH. | Mechanic |
| MEL | Minimum Equipment List |
| MGR | Manager |
| MMEL | Master Minimum Equipment List |
| MOA | Maintenance Organisation Approval |
| MoC | Means Of Compliance |
| MOE | Maintenance Organisation Exposition |
| MOM | Maintenance Organisation Manual |
| MPD | Maintenance Planning Document |
| MRB | Maintenance Review Board |
| MS | Member State (of The European Community) |
| MS | Military Standards |
| MS | Master of Science |
| MS | Maintenance Schedule |
| MSA | Member States Administration |
| MTC | Maintenance Task Card |
| MTOE | Maintenance Training Organisation Exposition |
| MTOP | Maximum Take-Off Power |
| N/A | Not Applicable |
| NAA | National Aviation Authority |
| NAS | National Aerospace Standards |
| NCR | Non Conformity Report |
| NDI | Non-Destructive Inspection |
| NDT | Non-Destructive Testing |
| NIS | Not In Stock |
| NPA | Notice Of Proposed Amendment |
| O/H | Overhaul |
| OC | On Condition |
| OCP | Organisations Certification Procedure |
| OEM | Original Equipment Manufacturer |
| OJT | On Job Training |
| Ops | Operations |
| OTIR | One Time Inspection Request |
| P | Propeller |
| P/N | Part Number |
| PAD | Proposed Airworthiness Directive |
| PME | Precision Measuring Equipment |
| PO | Purchase Order |
| POS | Position |
| PP&C | Production Planning And Control |
| PPA | Products, Parts And Appliances |
| PPM | Particle Per Million |
| QA | Quality Assurance |
| QC | Quality Control |
| QCD | Quality Control Delegate |
| RG | Rulemaking |
| RIA | Regulatory Impact Assessment |
| RII | Required Inspection Item |
| RTA | Request For Technical Advice |
| S/N | Serial Number |
| SAE | Society Of Automotive Engineers |
| SAFA | Safety Assessment Of Foreign Aircraft |
| SB | Service Bulletin |
| SDR | Service Defect Report |
| SIL | Service Information Letter |
| SL | Service Letter |
| SLI | Stock Level Increase |
| SoD | State Of Design |
| SoR | State Of Registry |
| SRM | Structural Repair Manual |
| STC | Supplemental Type Certificate |
| STD | Synthetic Training Device |
| TBO | Time Between Overhaul |
| TC | Type Certificate |
| TCDS | Type Certificate Data Sheet |
| TPM | Technical Procedures Manual |
| TSN | Time Since New |
| TSO | Time Since Overhaul |
| W/O | Work Order |
| WA | Working Arrangement |
| WCCR | Work Content Change Request |
| WDM | Wiring Diagram Manual |
| WG | Working Group |
