ANAC Agricultural Pilot Helicopter (PAGH) key terms

A mandatory notice issued by the aviation authority requiring inspection, repair, or modification of an aircraft or component to correct an unsafe condition. Compliance is legally required and often time-limited.

A document confirming that an aircraft meets the applicable airworthiness requirements and is safe to operate. It must be renewed or validated as prescribed by the authority.

A certification signed by authorized maintenance personnel stating that specified maintenance has been completed and the aircraft or component is fit for return to service.

An authorization issued by the civil aviation authority permitting an operator to conduct agricultural aviation operations, subject to specific conditions, training, and equipment requirements.

The use of an aircraft for dispensing products such as pesticides, fertilizers, or seeds, or for other tasks directly related to agriculture, forestry, or pest control.

The pilot responsible for the operation and safety of the aircraft during flight time, with final authority for decisions concerning the aircraft.

Rules governing flight under which the pilot maintains visual reference to the ground and avoids collisions by seeing and avoiding other aircraft and obstacles.

Weather conditions expressed in terms of visibility, distance from cloud, and ceiling equal to or better than specified minima, permitting flight under visual flight rules.

An authorization allowing flight under visual flight rules within controlled airspace when weather conditions are below normal VMC minima, subject to air traffic control clearance and specified conditions.

The height above ground level of the lowest layer of cloud covering more than half the sky, or of the vertical visibility into an obscuration such as fog.

The altitude at which the aircraft would perform as if at that altitude in the standard atmosphere, accounting for pressure altitude and non-standard temperature. High density altitude reduces performance.

The altitude indicated when the altimeter subscale is set to the standard pressure of 1013.25 hPa (29.92 inHg). It is used for performance calculations and flight levels.

The local pressure value set on an altimeter subscale so that the instrument indicates height above a specified reference, such as mean sea level or aerodrome elevation.

The altimeter subscale setting that, when set on an altimeter at aerodrome elevation, causes the altimeter to indicate elevation above mean sea level.

The point at which the total weight of the helicopter is considered to act. Its position must remain within approved limits for safe control and performance.

The determination and control of aircraft weight and center of gravity position to ensure they remain within approved limits throughout the flight.

The difference between the maximum permissible take-off mass and the empty mass of the helicopter, comprising crew, passengers, baggage, fuel, and dispensable load.

The maximum mass at which the helicopter is certified for take-off, as specified in its flight manual and type certificate.

The pre-flight calculation of take-off, climb, hover, and landing performance using the flight manual, considering mass, altitude, temperature, and wind.

The additional lift produced by a helicopter rotor as it moves horizontally through the air, improving efficiency and reducing induced power required compared with hovering.

The condition in forward flight where rotor efficiency markedly improves because the rotor disc clears its own downwash, typically occurring around 10 to 20 knots of airspeed.

The downward velocity of air through the rotor disc produced by the generation of lift. It affects power required and is strongest in the hover.

The unequal lift produced on advancing and retreating sides of a rotor in forward flight due to differing relative airflow velocities, compensated by blade flapping and cyclic pitch changes.

A stall on the retreating side of the rotor disc at high forward speed or high blade loading, caused by excessive angle of attack as the blade moves opposite to the aircraft's direction.

The reduction in induced power required and improvement in lift when hovering close to a surface, caused by restriction of the rotor downwash and altered airflow patterns.

The effective use of all available resources, including human, technical, and informational, to achieve safe and efficient flight operations, emphasizing communication, teamwork, and decision-making.

The perception and understanding of factors and conditions affecting the aircraft and crew, and the projection of their future status to support safe decision-making.

The study of how human capabilities and limitations affect performance in aviation, including perception, cognition, physiology, and social factors, to improve safety and efficiency.

A pilot's incorrect perception of the aircraft's position or motion relative to the earth, often caused by conflicting visual and vestibular cues in degraded visual conditions.

The amount of product applied per unit area, typically expressed in liters per hectare, determined by nozzle flow, spray pressure, and swath width.

The effective width of the spray pattern deposited by an aircraft in one pass, determined by nozzle arrangement, spray height, and wind conditions.

The process of measuring and adjusting nozzle output to achieve the desired application rate and spray pattern, accounting for speed, pressure, and product characteristics.

The movement of spray droplets away from the target area by wind or air currents, which can reduce efficacy and cause off-target contamination.

A designated area adjacent to sensitive sites where agricultural spraying is restricted or prohibited to prevent contamination from drift.

The onboard equipment for dispensing agricultural products, including tank, pump, plumbing, valves, nozzles, and controls, designed for accurate and safe application.

A device that automatically transmits a distress signal on a designated frequency after a crash impact, aiding search and rescue.

An airborne radar beacon transmitter that replies to interrogation from ground radar, providing aircraft identification and altitude information to air traffic control.

The exchange of voice messages between aircraft and ground stations using prescribed frequencies, phraseology, and procedures to ensure clear and safe communication.