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Bird impact disables a jet engine on take off

submitted by SFOGuy

9 years 2 months 1 week ago

Everyday normal Lufthansa A321 take off from a urban airport (Beirut Lebanon) at 4:48 AM---until 1:43 into the video.

March 17th, 2015.

You can see the quite spectacular explosion of stuff from the port engine right outside the passenger's view---then something isn't right, and by 2:18, the engine is spooling down. later, instead of that smooth turbine whine, scary scraping sounds show up (damaged blades scraping the interior of the containment casing?)

No need for a miracle on the Hudson---but scary nonetheless.

FAA engine standards for certification are interesting:

After "swallowing" a smallish goose (formally up to 3.65kg) the engine must still pull at least half of the thrust for at least 14 minutes, and must not become dangerous for the plane (no fire, no uncontained failure i.e. no blades thrown through the engine casing and into the passenger cabin).

After ingesting a flock of ducks (16 birds no more than 0.85kg each) the engine must still work for about 20 minutes.

There are also requirements for various sizes and number of birds in between, and some requirements depend on the inlet size. In general, seems that after the bird strike the engine is required to stay safe and even work for some time, but not for long.

The weight range for Canada geese (the Hudson flight) is 2.5-6.5kg (14.5 lbs).
A sparrow weighs about 25-40g (up to 1.4 ozs)
The sparrow is not an African sparrow and it is unladen in the tests.