A widely used Boeing aircraft, the 737-800, was involved in Sunday’s crash-landing of a Jeju Air flight that killed 179 people.

South Korean officials plan to conduct safety inspections of all Boeing 737-800 aircraft operated by the country’s airlines, as they struggle to determine what caused a weekend plane crash that killed

Boeing shares were down as much as 6% Monday morning. Authorities in Korea believe a bird strike could have been a factor in the fatal crash.

Shares of Boeing fell in early trading on Monday, one day after a Boeing model 737-800 was involved in the Jeju Air plane crash in South Korea that killed scores of passengers. The slide came hours after South Korea's transportation ministry announced it would investigate the crash and conduct a full inspection of all Boeing 737-800 aircraft in use in South Korea.

Bird feathers have been found in an engine recovered from the site of the deadly Jeju Air flight which crashed-landedand killed 179 people in South Korea, investigators said. The Boeing 737 -800 skidded off a runway at Muan International Airport and hit a concrete fence,

South Korean authorities have extended the closure of a southwestern airport where a Jeju Air plane crashed and killed 179 people onboard, the land ministry said Monday.