Repir Station Definitions

These definitions were copied from federal regs. You can view the complete document at www.faa.gov/avr/iasa/part6.doc.

6.2.1.6 RATINGS OF THE AMO
The following ratings are issued under this Subpart:

1. Airframe ratings. An aircraft rating on a maintenance organisation certificate permits that maintenance organisation to perform maintenance, preventive maintenance, or modifications on an aircraft, including work on the powerplant(s) of that aircraft up to, but not including, overhaul as that term defined in 5.1.1.2(a)(5) under the following classes:
   1. Class 1: Aircraft (other than rotorcraft and aircraft composed primarily of composite material) of 5,700 kg maximum certificated takeoff weight or less.
   2. Class 2: Aircraft (other than rotorcraft and aircraft composed primarily of composite material) over 5,700 kg maximum certificated takeoff weight and up to, and including, 34,200 kg maximum certificated takeoff weight.
   3. Class 3: Aircraft, by make and model, (other than rotorcraft and aircraft composed primarily of composed primarily composite material) over 34,200 kg maximum certificated takeoff weight.
   4. Class 4: Rotorcraft (other than rotorcraft composed primarily of composite material) of 2,736 kg maximum certificated takeoff weight or less.
   5. Class 5: Rotorcraft (other than rotorcraft composed primarily of composite material) over 2,736 kg maximum certificated takeoff weight.
   6. Class 6: Aircraft composed primarily of composite material, of 5,700kg maximum certificated takeoff weight or less.
   7. Class 7: Aircraft composed primarily of composite material, over 5,700 kg maximum certificated takeoff weight
2. Powerplant ratings. A powerplant rating on a maintenance organisation certificate permits that maintenance organisation to perform maintenance, preventive maintenance, or modifications of powerplants under the following classes:
   1. Class 1: Reciprocating engines.
   2. Class 2: Turbopropeller and turboshaft engines.
   3. Class 3: Turbojet and turbofan engines.
3. Propeller ratings. A propeller rating on a maintenance organisation certificate permits that maintenance organisation to perform maintenance, preventive maintenance, or modifications of propellers under the following classes:
   1. Class 1: Fixed-pitch and ground-adjustable propellers.
   2. Class 2: Variable-pitch propellers.
4. Avionics ratings. An avionics rating on a maintenance organisation certificate permits that maintenance organisation to perform maintenance, preventive maintenance, or modifications of avionics equipment under the following ratings:
   1. Class 1: Communication equipment: Any radio transmitting equipment or receiving equipment, or both, used in aircraft to send or receive communications, regardless of carrier frequency or type of modulation used; including auxiliary and related aircraft interphone systems, amplifier systems, electrical or electronic intercrew signalling devices, and similar equipment; but not including equipment used for navigation of the aircraft or as an aid to navigation, equipment 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 avionics equipment.
   2. Class 2: Navigational equipment: Any avionics system used in aircraft for en-route or approach navigation, except equipment operated on radar or pulsed radio frequency principles, but not including equipment for measuring altitude or terrain clearance or other distance equipment operated on pulsed radio frequency principles.
   3. Class 3: Pulsed equipment: Any aircraft electronic system operated on pulsed radio frequency principles.
5. Computer systems ratings. A computer systems rating on a maintenance organisation certificate permits that maintenance organisation to perform maintenance, preventive maintenance, or modifications of digital computer systems and components thereof, that have the function of receiving external data, processing such data, and transmitting and presenting the processed data under the following classes:
   1. Class 1: Aircraft computer systems.
   2. Class 2: Powerplant computer systems.
   3. Class 3: Avionics computer systems.
6. Instrument ratings. An instrument rating on a maintenance organisation certificate permits that maintenance organisation to perform maintenance, preventive maintenance, or modifications of instruments under the following classes:
   1. Class 1: Mechanical: Any diaphragm, bourdon tube, aneroid, optical, or mechanically driven centrifugal instrument that is 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: Any self-synchronous and electrical indicating instruments and systems, including remote indicating instruments, cylinder head temperature gauges, or similar electrical instruments.
   3. Class 3: Gyroscopic: Any 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: Any instruments whose operation depends on electron tubes, transistors, or similar devices including capacitance type quantity gauges, system amplifiers, and engine analysers.
7. Accessory ratings. An accessory rating on a maintenance organisation certificate permits that maintenance organisation to perform maintenance, preventive maintenance, or modifications of accessory equipment under the following classes:
   1. Class 1: Mechanical. The accessories that depend on friction, hydraulics, mechanical linkage, or pneumatic pressure for operation.
   2. Class 2: Electrical. The accessories that depend on electrical energy.
   3. Class 3: Electronic. The accessories that depend on the use of an electron tube transistors, lasers, fiber optics, solid-state, integrated circuits, vacuum tubes, or similar electronic controls.
   4. Class 4: Auxiliary power units (APU’s) that may be installed on aircraft as self-contained units to supplement the aircraft’s engines as a source of hydraulic, pneumatic, or electrical power.

6.2.1.7 AMO LIMITED RATINGS

1. Whenever the Authority finds it appropriate, it may issue a limited rating to an AMO that maintains or alters only a particular type of airframe, powerplant, propeller, radio, instrument, or accessory, or parts thereof, or performs only specialised maintenance requiring equipment and skills not ordinarily found in an AMO. Such a rating may be limited to a specific model aircraft, engine, or constituent part, or to any number of parts made by a particular manufacturer.
2. Limited ratings are issued for—
   1. Aircraft;
   2. Airframe;
   3. Powerplants;
   4. Propellers;
   5. Avionics equipment;
   6. Computer systems;
   7. Instruments;
   8. Accessories; and
   9. Any other purpose for which the Authority finds the applicant’s request appropriate.
3. Specialised service ratings. A specialised service rating may be issued to a maintenance organisation to perform specific maintenance or processes. The specific operating previsions of the maintenance organisation must identify the specification used in performing that specialised service. The specification may be--
   1. A civil or military specification that is currently used by industry and approved by the Authority; or
   2. A specification developed by the maintenance organisation and approved by the Authority.