ATPL: The equipment of an oxygen supply installation must be kept absolutely free of oil or grease traces as:
Domanda 491, Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license
| These Substances Mixed With Oxygen Could Catch Fire In The Presence Of A Spark. |
| The oxygen system would be contaminated. |
| These substances could plug the oxygen masks filters. |
| These substances catch fire spontaneously in the presence of oxygen under pressure. |
