[Code of Federal Regulations]

[Title 14, Volume 3]

[Revised as of January 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 14CFR145.59]



[Page 55]

 

                     TITLE 14--AERONAUTICS AND SPACE

 

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 

                               (CONTINUED)

 

PART 145_REPAIR STATIONS--Table of Contents

 

                         Subpart B_Certification

 

Sec. 145.59  Ratings.



    The following ratings are issued under this subpart:

    (a) Airframe ratings.

    (1) Class 1: Composite construction of small aircraft.

    (2) Class 2: Composite construction of large aircraft.

    (3) Class 3: All-metal construction of small aircraft.

    (4) Class 4: All-metal construction of large aircraft.

    (b) Powerplant ratings.

    (1) Class 1: Reciprocating engines of 400 horsepower or less.

    (2) Class 2: Reciprocating engines of more than 400 horsepower.

    (3) Class 3: Turbine engines.

    (c) Propeller ratings.

    (1) Class 1: Fixed-pitch and ground-adjustable propellers of wood, 

metal, or composite construction.

    (2) Class 2: Other propellers, by make.

    (d) Radio ratings.

    (1) Class 1: Communication equipment. Radio transmitting and/or 

receiving equipment used in an aircraft to send or receive 

communications in flight, regardless of carrier frequency or type of 

modulation used. This equipment includes auxiliary and related aircraft 

interphone systems, amplifier systems, electrical or electronic 

intercrew signaling devices, and similar equipment. This equipment does 

not include equipment used for navigating or aiding navigation of 

aircraft, equipment used for measuring altitude or terrain clearance, 

other measuring equipment operated on radio or radar principles, or 

mechanical, electrical, gyroscopic, or electronic instruments that are a 

part of communications radio equipment.

    (2) Class 2: Navigational equipment. A radio system used in an 

aircraft for en route or approach navigation. This does not include 

equipment operated on radar or pulsed radio frequency principles, or 

equipment used for measuring altitude or terrain clearance.

    (3) Class 3: Radar equipment. An aircraft electronic system operated 

on radar or pulsed radio frequency principles.

    (e) Instrument ratings.

    (1) Class 1: Mechanical. A diaphragm, bourdon tube, aneroid, 

optical, or mechanically driven centrifugal instrument used on aircraft 

or to operate aircraft, including tachometers, airspeed indicators, 

pressure gauges drift sights, magnetic compasses, altimeters, or similar 

mechanical instruments.

    (2) Class 2: Electrical. Self-synchronous and electrical-indicating 

instruments and systems, including remote indicating instruments, 

cylinder head temperature gauges, or similar electrical instruments.

    (3) Class 3: Gyroscopic. An instrument or system using gyroscopic 

principles and motivated by air pressure or electrical energy, including 

automatic pilot control units, turn and bank indicators, directional 

gyros, and their parts, and flux gate and gyrosyn compasses.

    (4) Class 4: Electronic. An instrument whose operation depends on 

electron tubes, transistors, or similar devices, including capacitance 

type quantity gauges, system amplifiers, and engine analyzers.

    (f) Accessory ratings.

    (1) Class 1: A mechanical accessory that depends on friction, 

hydraulics, mechanical linkage, or pneumatic pressure for operation, 

including aircraft wheel brakes, mechanically driven pumps, carburetors, 

aircraft wheel assemblies, shock absorber struts and hydraulic servo 

units.

    (2) Class 2: An electrical accessory that depends on electrical 

energy for its operation, and a generator, including starters, voltage 

regulators, electric motors, electrically driven fuel pumps magnetos, or 

similar electrical accessories.

    (3) Class 3: An electronic accessory that depends on the use of an 

electron tube transistor, or similar device, including supercharger, 

temperature, air conditioning controls, or similar electronic controls.