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by seanherron
3857 days ago
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In what modern situation would a whole plane parachute actually help save lives? The vast majority of the (extremely rare) commercial aircraft disasters occur during takeoff or landing, when a parachute would provide little utility due to the distance the aircraft is from the ground. Other notable recent disasters had either instantaneous destruction of the aircraft (Metrojet 9268, Malaysian 17) or were caused by pilot error or murder/suicide (Germanwings 9525, Colgan 2407). Perhaps the only incident I can think of where a parachute may have helped was US Airways 1549, where a bird strike caused loss of power to both engines. In that case, however, sufficient safety controls existed to enable landing on the Hudson river, and the aircraft functioned as designed (engines broke off when hitting water, the aircraft floated long enough to ensure safe evacuation of all passengers, life rafts deployed, etc). I would argue a parachute would probably have resulted in loss of life as a giant A320 parachute falling uncontrolled on to New York City would probably kill people crashing in to a building. Rather than focus on superfluous, impractical safety measures, commercial aircraft designers have instead spent time on things that actually save lives, such as Traffic Avoidance and Ground Proximity warning systems. Note that parachutes do exist for smaller planes, where the risks and benefits are substantially different. A good example is the Cirrus SR-22. It seems that most cases of deploying the parachute on the Cirrus is due to pilots running out of fuel, a failure which is extremely improbable in commercial aviation. |
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Another is United 232, the Sioux City crash during a landing where all hydraulics had been lost, leaving the pilots with only differential thrust to steer with.
Perhaps TWA 800, if I'm recalling correctly that the explosion basically decapitated the plane leaving the passenger section largely intact.
Also maybe Aloha 243. That plane was able to land after a large chunk of the cabin blew out with no fatalities other than a crew member who was sucked out during the initial blow out, so like USAir 1549 a parachute would not have saved any lives in that particular incident. In that type of incident, though, it probably would have been a good option. Such incidents leave the pilots with a plane that is flying at the moment, but that has severe structural damage leaving them with no idea what maneuvers they can do without tearing it apart and no idea if it is even going to hold together in stable level flight. That would probably be an incident where your probabilities would be better with popping the 'chute.