Read the following report and answer the questions by choosing the correct/most appropriate option:(1) How bird hits happen, why they are a concern?
New Delhi June 20
At least two bird strike incidents happened on Sunday. Both aircrafts returned to their airports of origin and were grounded for maintenance. An ABC aircraft, which took off from Guwahati towards Delhi, suffered damage to its left engine following a bird hit at 1600 feet. The pilots returned to Guwahati. The other strike happened on another flight from Patna to Delhi. The pilots of the aircraft suspected a bird strike during the take-off roll but continued to climb. Following the take off rotation, they were informed by the cabin crew of sparks emanating from the left engine. Subsequently, the pilots were also informed by air traffic control of smoke coming out of one of the engines. The pilots declared an emergency and returned to Patna.
(2) Why are bird strikes a concern?
Bird strikes are among the most common threats to aircraft safety, and they typically occur during take-off or landing. Dozens of bird-strikes happen each day but some can be more dangerous than others. Typically, when birds collide with an aircraft's airframe, it is unlikely to cause significant problems for the pilots flying. But there are instances when the aircraft engine ingests the birds. This can lead to a loss of thrust for the engine and cause maneuverability problems for the crew. In these cases, where a jet engine ingests a bird, procedures would generally call for pilots to land the plane at the closest airport. While most airframe bird strikes are not considered critical to air safety, if a collision cracks a window or a wind screen, pilots will look to land as early as possible.
(3) How critical are bird strikes to air safety?
Smaller planes would generally be more susceptible to the dangers of bird strikes than larger ones.
However, given that bird strikes mostly happen during take-off and landing, these incidents could distract the pilots during what are highly critical phases of flights that demand the complete attention of the crew.
(4) What causes bird-strikes?
The presence of birds around an aircraft increases the chances of a bird strike. In the monsoon, as water puddles emerge on open grounds attracting insects to breed, the presence of birds increases. In some cases, bird hits also happen at higher altitudes when a plane is cruising. These are more dangerous than the low-altitude hits, given that they can cause rapid depressurization of cabins. Other reasons for bird activity around the air field could be presence of landfills or waste disposal sites that can attract a large number of birds.