Boeing CEO Dave Calhoun acknowledged errors by the US planemaker, telling staff the company would ensure an accident like the mid-air Alaska Airlines panel blowout “can never happen again”, as more than 170 jets remained grounded for a fourth day.

10 Afghan nationals were among 176 people killed when a Ukrainian International Airlines plane crashed minutes after taking off from Tehran early Wednesday morning.

All 143 passengers aboard a Boeing 737 escaped alive after the jet slid off a Florida runway and finished up in a river.

A civilian defense attorney aboard the military-chartered Boeing 737 that skidded into a Florida river said the landing "didn't feel right."