Under global aviation safety standards enforced by the FAA and EASA in 2026, a Boeing 737 (and any other commercial passenger aircraft) must be capable of being fully evacuated in 90 seconds or less. This "90-second rule" is a mandatory certification requirement for every aircraft type. To pass this test, the manufacturer must demonstrate that a full load of passengers and crew can exit the plane using only 50% of the available emergency exits in dark or simulated emergency conditions. This specific time limit was established because research shows that in a post-crash fire, the "flashover" (the point where the cabin becomes unsurvivable due to heat and smoke) typically occurs around the two-minute mark. In 2026, there is ongoing debate among safety regulators about whether the 90-second standard should be updated to account for an aging population and the increased use of carry-on bags, which frequently (and illegally) slow down real-world evacuations during emergencies.
Under strict FAA and EASA safety regulations, a Boeing 737 (and any other commercial aircraft) must be able to be fully evacuated in 90 seconds or less. This "90-second rule" is a mandatory certification requirement. During these tests, the aircraft must be evacuated with only half of its emergency exits available and in "darkened" cabin conditions to simulate a real emergency. This time limit exists because research shows that in the event of a post-crash fire, the cabin typically remains habitable for about two minutes before a "flashover" (where the heat becomes unsurvivable) occurs. In 2026, while there are ongoing debates about whether these tests account for an aging population or passengers stopping to grab luggage, the 90-second benchmark remains the legal gold standard. Every second counts, which is why flight attendants are trained to use "loud and assertive" commands to move passengers toward the slides as quickly as possible.