PCAR / CAAP Maintenance Regulations and Aircraft Registration Vocabulary

Vocabulary key terms and definitions based on the Philippine Civil Aviation Regulations (PCAR) and CAAP reviewer content.

Instruction Unit Hour (AMT)

An instruction unit hour in an Aviation Maintenance Technician (AMT) curriculum shall be not less than $50\,\text{minutes}$.

General Subjects Requirement (AMT Curriculum)

The requirement that each Aviation Maintenance Technician rating curriculum must include $400\,\text{hours}$ of general subjects.

Shop Class Instructor Ratio

The requirement that an Aviation Training Organization (ATO) must provide at least one appropriately licensed instructor for every $25\,\text{students}$ in shop classes where actual tasks are performed.

DEWIZ

Distant Early Warning Identification Zone.

Unmanned Aircraft

An aircraft intended to be operated with no pilot on board, comprising unmanned free balloons and remotely piloted aircraft (RPA).

Gyroplane

A heavier-than-air, power-driven rotorcraft.

Airship

A lighter-than-air, power-driven aircraft.

Glider

A heavier-than-air, non-power-driven aircraft.

Captive Balloon

A lighter-than-air, non-power-driven aircraft generally designated as a kite-balloon.

Amphibian

An aeroplane capable of operating from both land and water.

Ornithopter

An aircraft category listed in PCAR classification tables for the purpose of completeness only.

RP-C Registration Mark

Marking used for an aircraft fully complying with airworthiness requirements for carrying persons or property, for or without hire (except gliders).

RP-G Registration Mark

Marking displayed by a glider fully complying with airworthiness requirements.

RP-R Registration Mark

Marking for an aircraft complying only in limited respect with airworthiness requirements (compensated by operating limitations), used for industrial purposes, and prohibited from carrying passengers.

RP-X Registration Mark

Marking assigned to an aircraft that has applied for an experimental certificate.

RP-S Registration Mark

Marking assigned to non-type certificated aircraft.

RP Registration Mark (Alone)

Identification mark used immediately preceding the identification number for aircraft used solely for governmental purposes or belonging to government units, except the Philippine Army.

Aircraft Identification Plate

A plate made of fireproof metal or other fireproof material, ranging in size from $1 \times 2\,\text{in}$ to $6 \times 3\,\text{in}$, containing machine-etched (not painted) markings.

RPA Registration Mark Format

Markings displayed on registered RPAs in the format RP-U followed by 001-999 and a letter A-Z, located on the visible side of the Electronic Control Module (ECM).

Special Flight Permit

A document that authorizes flight for an aircraft that does not currently meet applicable airworthiness requirements but is capable of safe flight.

Appliance Major Repair

The classification under PCAR 5 for calibration and repair of avionics computer equipment.

Return to Service / Maintenance Release

A document signed by an authorized representative certifying that an aircraft or aeronautical product is fit for service following inspection, maintenance, rebuilding, or modification.

Airframe Major Modification

A change to the basic design of an aircraft's fuel system or oil-cooling system.

Technical Standard Order (TSO)

A minimum performance standard issued by the State of Design for specified materials, parts, or appliances used on civil aircraft.

Class 1 Aeronautical Product

A complete aircraft, aircraft engine, or propeller.

Class 2 Aeronautical Product

A major component of a Class 1 product (such as a wing, control surface, or transmission) whose failure would jeopardize the safety of a Class 1 product.

Class 3 Aeronautical Product

Any part or component that is not a Class 1 or Class 2 aeronautical product.

Supplemental Type Certificate (STC)

An approval issued to a person introducing a major change in type design that is not great enough to require a new type certificate.

Standard Certificate of Airworthiness

A Certificate of Airworthiness issued for aircraft in the category and model designated by the State of Design in the type certificate.

PMA Parts

Alternative replacement or modification parts produced by a manufacturer other than the Original Equipment Manufacturer (OEM) under Parts Manufacturer Approval.

Operational Check Task

A maintenance task that examines the relation of a system to the entire aircraft.

Required Inspection Item (RII)

A critical maintenance task requiring specific inspection before authorization, such as the final inspection of flight control installations.