GCAA CAR-66 B1 Exam flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Category B1 licence

A CAR-66 certifying staff category covering mechanical, airframe and engine maintenance certification privileges on the aircraft types endorsed on the licence.

Certificate of Release to Service

A certification issued after maintenance confirming the work was performed satisfactorily and the aircraft is airworthy for return to service.

SHELL model

A human factors model with Software, Hardware, Environment and Liveware, where the central Liveware is the person interfacing with each other element.

Error chain

The concept that accidents usually result from multiple latent and active failures aligning in sequence; breaking any link prevents the outcome.

Situational awareness

The perception of elements in the environment, comprehension of their meaning, and projection of their status into the near future.

Type Certificate

An approval of an aircraft design issued by the state of design, confirming the design meets the applicable airworthiness requirements.

Airworthiness Directive

A mandatory instruction issued to correct an unsafe condition, requiring compliance within a stated timescale by affected aircraft operators.

ICAO Annex 1

The international standard on personnel licensing, providing the baseline for national licensing requirements such as CAR-66.

Oleo strut

A landing gear shock absorber using hydraulic fluid and compressed air to convert vertical kinetic energy into heat and damp landing loads.

ATA chapters

A standard numbering system dividing aircraft systems into chapters, used to organise maintenance manuals, task cards and records.

Ohm's law

The relationship V = I × R, stating that voltage equals current multiplied by resistance in a resistive circuit.

RMS value

The effective value of a sine wave, equal to the peak value divided by the square root of two, approximately 0.707 times peak.

Capacitive reactance

The opposition a capacitor presents to AC, given by Xc = 1/(2πfC), decreasing as frequency or capacitance increases.

Zener diode

A diode operated in reverse breakdown to provide a stable reference voltage in regulator and protection circuits.

NAND gate

A universal logic gate whose output is 0 only when all inputs are 1; it can be combined to build any other logic function.

Electrostatic discharge

A sudden transfer of static charge between objects that can destroy semiconductor devices; controlled by wrist straps and grounded mats.

Galvanic corrosion

Corrosion caused when two dissimilar metals are in contact in the presence of an electrolyte, with the more active metal corroding.

Rivet

A permanent fastener whose shank expands to fill the hole and whose formed head locks two or more sheets together.

Delamination

Separation of the layers in a composite laminate, often caused by impact or manufacturing defects, reducing structural strength.

Minimum Equipment List

An approved document allowing dispatch with specified equipment inoperative, subject to defined conditions and rectification intervals.

Duplicate inspection

A requirement for two independent persons to inspect and certify a task where a single error could be catastrophic, such as flight control connections.

Critical angle of attack

The angle of attack at which airflow separates from the wing and the wing stalls, regardless of airspeed.

Induced drag

Drag caused by lift generation, increasing with the square of the lift coefficient and decreasing as aspect ratio increases.

Critical Mach number

The free-stream Mach number at which local airflow over some part of the aircraft first reaches the speed of sound.

Semi-monocoque

A structural construction where a stressed skin is supported by frames and stringers to carry and distribute loads.

Fail-safe design

A design philosophy allowing a structure to retain residual strength after a component fails, so the failure is detected before it becomes critical.

Brayton cycle

The thermodynamic cycle of a gas turbine: compression, constant-pressure combustion, and expansion through a turbine to produce work.

Compressor surge

A reversal of flow through the compressor caused by excessive back-pressure, prevented by bleed valves and variable stator vanes.

Bypass ratio

The mass flow of air through the fan bypass duct divided by the mass flow through the engine core.

Constant-speed propeller

A propeller whose blade angle is varied by a governor to maintain a selected RPM as load and airspeed change.

Feathering

Rotating propeller blades to align with the airflow to minimise drag after an engine failure.

Propeller slip

The difference between the geometric pitch of a propeller and its effective pitch, representing the loss due to air not being a solid medium.