Compressor stall The airliner successfully made a forced landing in a forest clearing without loss of life. On January 15, 2009, US Airways Flight 1549, an Airbus A320, ditched in the Hudson River about five minutes after takeoff. The apparent cause was compressor stall in both CFM International CFM56-5B engines after flying through a flock of birds about 90 seconds after takeoff. This same aircraft may have suffered a compressor stall on the right engine two days earlier. After an incident in which an Airbus A321-200 experienced compressor stalls on both engines during initial climbout on December 15, 2008, an EASA Emergency
Flock (birds) learned by the juveniles within a flock meaning that these individuals will be better equipped as adults to ward off predators and respond rapidly when a predator is in sight. Bird species living in a flock are able to capture prey, likely injured, from an unsuccessful bird within its flock. This behavior is known as the beater effect and is one of the benefits of birds foraging in a flock with other birds. It can be seen that birds in a flock may perform the information-sharing model. In this situation the entire flock would search for food and the first