MCF maintenance check flights

MET meteorology/meteorologic

MET provider Meteorological service provider, indirectly, competent authority

MH17 Malaysia Airlines flight 17

MMEL master minimum equipment list 

mn minutes

MO maintenance organisation

MOPS minimum operational performance specification

MOPSC maximum operational passenger seating configuration

MPL multi-crew pilot licence

MRB Maintenance Review Board

MS Member States

MST Member States' tasks

MTO maintenance training organisation

MTOM maximum take-off mass

NAAs national aviation authorities

NCC non-commercial air operations with complex motor-powered aircraft

NCO non-commercial air operations with other-than-complex motor-powered aircraft

NDB non-directional beacon

NextGen next generation

NO Norway

NoA Network of Analysts

NPA notice of proposed amendment

OEM original equipment manufacturer

OJ Official Journal of the European Union

OPS air operations

OpSpecs operations specifications

ORO.FC. organisation requirements for air operations. flight crew.

PANS procedures for air navigation services (ICAO)

Part-21 airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations

Part-145 maintenance organisation approvals

Part-147 training organisations requirements

Part-21 Subpart H Airworthiness certificates and restricted certificates of airworthiness

Part-26 additional airworthiness requirements for operations

Part-66 certifying staff

Part-ARO