10.
When reference is made to series, type and group in the limitation section of class A and B, series means a specific type series such as Airbus 300 or 310 or 319 or Boeing 737-300 series or RB211-524 series or Cessna 150 or Cessna 172 or Beech 55 series or continental O-200 series etc; type means a specific type or model such as Airbus 310-240 type or RB 211-524 B4 type or Cessna 172RG type; any number of series or types may be quoted; group means for example Cessna single piston engine aircraft or Lycoming non-supercharged piston engines etc.

11.  
When a lengthy capability list is used which could be subject to frequent amendment, then such amendment may be in accordance with the indirect approval procedure referred to in points M.A.604(c) and M.B.606(c) or 145.A.70(c) and 145.B.40, as applicable.

12.  
A maintenance organisation which employs only one person to both plan and carry out all maintenance can only hold a limited scope of approval rating. The maximum permissible limits are:

CLASS  RATING  LIMITATION 
CLASS AIRCRAFT  RATING A2 AEROPLANES 5700 KG AND BELOW  PISTON ENGINE 5700 KG AND BELOW 
CLASS AIRCRAFT  RATING A3 HELICOPTERS  SINGLE PISTON ENGINE 3175 KG AND BELOW 
CLASS AIRCRAFT  RATING A4 AIRCRAFT OTHER THAN A1, A2 AND A3  NO LIMITATION 
CLASS ENGINES  RATING B2 PISTON  LESS THAN 450 HP 
CLASS COMPONENTS RATING OTHER THAN COMPLETE ENGINES OR APU’S.  C1 TO C22  AS PER CAPABILITY LIST 
CLASS SPECIALISED  D1 NDT  NDT METHOD(S) TO BE SPECIFIED. 

It should be noted that such an organisation may be further limited by the competent authority in the scope of approval dependent upon the capability of the particular organisation.
EU 127/2010
PART-M Appendices
EU 127/2010

13. Table
CLASS  RATING  LIMITATION  BASE  LINE 
AIRCRAFT  A1 Aeroplanes above 5700 kg  [Rating reserved to Maintenance Organisations approved in accordance with Annex II (Part-145)] [Shall state aeroplane manufacturer or group or series or type and/or the maintenance tasks] Example: Airbus A320 Series  [YES/ NO]*  [YES/ NO]* 
A2 Aeroplanes 5700 kg and below  [Shall state aeroplane manufacturer or group or series or type and/or the maintenance tasks] Example: DHC-6 Twin Otter Series  [YES/ NO]*  [YES/ NO]* 
A3 Helicopters  [Shall state helicopter manufacturer or group or series or type and/or the maintenance task(s)] Example: Robinson R44  [YES/ NO]*  [YES/ NO]* 
A4 Aircraft other than A1, A2 and A3  [Shall state aircraft series or type and/or the maintenance task(s).]  [YES/ NO]*  [YES/ NO]* 
ENGINES  B1 Turbine  [Shall state engine series or type and/or the maintenance task(s)] Example: PT6A Series 
B2 Piston  [Shall state engine manufacturer or group or series or type and/or the maintenance task(s)] 
B3 APU  [Shall state engine manufacturer or series or type and/or the maintenance task(s)] 
COMPONENTS OTHER THAN COMPLETE ENGINES OR APUs  C1 Air Cond & Press  [Shall state aircraft type or aircraft manufacturer or component manufacturer or the particular component and/ or cross refer to a capability list in the exposition and/or the maintenance task(s).] Example: PT6A Fuel Control 
C2 Auto Flight 
C3 Comms and Nav 
C4 Doors – Hatches 
C5 Electrical Power & Lights 
C6 Equipment 
C7 Engine – APU 
C8 Flight Controls 
C9 Fuel 
C10 Helicopter – Rotors 
C11 Helicopter – Trans 
C12 Hydraulic Power 
C13 Indicating -recording system 
C14 Landing Gear 
C15 Oxygen 
　
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