NCAA AME Avionics key terms

A legally binding notice issued by the civil aviation authority requiring inspection, modification, or corrective action on specified aircraft, engines, or components to restore or ensure continued airworthiness.

A mandatory inspection, replacement, or life limit contained in the aircraft's approved airworthiness limitations section of the maintenance manual, which cannot be altered without authority approval.

The inspection and maintenance schedule approved by the civil aviation authority for a given aircraft type, specifying tasks, intervals, and procedures that operators must follow to maintain airworthiness.

A certification, often called a release to service, signed by a licensed AME confirming that specified maintenance has been completed and the aircraft or component is fit for return to service.

The formal act of declaring an aircraft or component airworthy and available for operation following maintenance, performed by authorized certifying staff after all required work and inspections are complete.

A licensed person authorized under regulation to sign maintenance releases and certify that maintenance work on an aircraft or component has been performed to required standards.

The personnel licence issued by the civil aviation authority permitting the holder to perform and certify aircraft maintenance within the categories and ratings endorsed on it.

A classification of AME authorization, such as airframe, powerplant, avionics, or structures, defining the scope of maintenance tasks the licence holder may perform and certify.

An endorsement on an AME licence specifying a particular aircraft type or family that the holder is qualified and authorized to maintain and certify.

A formal training program covering the systems, maintenance procedures, and documentation for a specific aircraft type, required before obtaining a type rating endorsement.

Instruction focused on the variations between related aircraft models or configurations, allowing personnel already qualified on one variant to maintain another with limited additional training.

A documented entry recording maintenance performed, including date, description of work, references to approved data, and the identity of the person certifying the work.

A written record in an aircraft, engine, or component logbook describing maintenance actions, defects, and certifications, forming the historical trace of airworthiness status.

An internal document authorizing and tracking maintenance tasks, listing the scope of work, assigned personnel, parts used, and sign-offs for each step.

A controlled document derived from approved maintenance data that breaks a maintenance task into step-by-step instructions with sign-off spaces for completion and inspection.

Technical information authorized by the aviation authority for use in maintenance, such as approved manuals, service bulletins, engineering orders, or instructions for continued airworthiness.

Documentation provided by the design approval holder specifying maintenance and inspection tasks necessary to keep an aircraft or component airworthy throughout its service life.

A document issued by a manufacturer recommending or requiring inspection, modification, or part replacement on its products; some bulletins become mandatory when referenced by an airworthiness directive.

A mandatory or voluntary report submitted to the aviation authority describing failures, malfunctions, or defects found in aircraft systems or components, used for safety analysis.

An approved document listing equipment that may be inoperative under specified conditions while the aircraft remains airworthy, allowing dispatch with certain defects deferred.

A known fault or inoperative item that is permitted to remain unresolved for a defined period under approved procedures such as the MEL, subject to documented limitations and placards.

A drawing showing the electrical or electronic circuits of a system using standardized symbols, indicating connections and functional relationships without physical layout.

A drawing depicting the physical routing, connectors, splices, and terminal locations of aircraft wiring, used for troubleshooting and repair of electrical installations.

A standardized alphanumeric marking applied to aircraft wire identifying circuit function, gauge, and segment, enabling correct tracing and connection during maintenance.

The electrical connection of aircraft structure and components to provide a low-resistance path for fault currents and static discharge, protecting equipment and personnel.

The connection of an electrical circuit or equipment to the aircraft structure or a common return path to complete the circuit and establish a reference potential.

The sudden transfer of static electric charge between objects, capable of damaging sensitive avionics components; controlled through grounding, bonding, and protective handling procedures.

Diagnostic circuitry within avionics units that automatically monitors system operation, detects faults, and reports status codes to aid troubleshooting and maintenance.

An avionics component designed to be removed and replaced quickly at the aircraft level, typically without specialized shop equipment, to restore system function.

The systematic process of tracing a malfunction through a system using test equipment, schematics, and diagnostic indications to identify the defective component or connection.

A check confirming an uninterrupted electrical path through a wire or circuit, typically performed with an ohmmeter while the circuit is de-energized.

A measurement of the resistance of wire insulation to detect degradation, moisture, or contamination, performed with a megohmmeter at a specified test voltage.

A wire connection method in which a metal terminal is mechanically compressed onto a stripped conductor using a calibrated tool, providing a reliable electrical and mechanical joint.

A cable with a center conductor surrounded by insulation, a metallic shield, and an outer jacket, used to carry radio-frequency signals with minimal loss and interference.

A device that radiates or receives electromagnetic signals, installed on the aircraft with proper bonding and cable routing to support communication, navigation, and surveillance systems.

A pneumatic system supplying ram air pressure and static pressure to airspeed, altitude, and vertical speed instruments, requiring leak checks and careful servicing during maintenance.

An avionics unit that computes airspeed, altitude, and related parameters from pitot-static and temperature inputs and distributes them to displays and other systems.

The study of how human capabilities and limitations affect maintenance performance, including fatigue, complacency, communication, and error prevention in inspection and certification tasks.

A required second check of a critical maintenance task performed by a different qualified person to verify correctness before the work is certified and released.