ATPL: In regard to passengers briefing in public transport aeroplane, information about oxygen must be given to passengers through a demonstration. If a flight is to be carried out at FL 290, this demonstration must be completed before:
Domanda 266, Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license
| The Aircraft Reaches Fl 250. |
| The aircraft reaches FL 100. |
| Take-off. |
| The Aircraft Reaches Fl 140. |
