Subjects¶ Here you can find knowledge about the EASA ATPL subjects 010 - Air Law 021 - AGK - Airframes, Systems, Electrics & Power Plant 022 - Instrumentation 031 - Mass & Balance 032 - Performance 040 - Human Performance & Limitations 050 - Meteorology 061 - General Navigation 062 - Radio Navigation 070 - Operational Procedures 081 - Principles of Flight 090 - Communications 100 - Knowledge, Skills & Attitude