Dutch investigators have disclosed details of a second near-collision between a long-haul aircraft and a weather balloon in the space of seven months.
The Arkefly Boeing 767-300 (PH-OYJ) had been climbing out of Amsterdam Schiphol after departure from runway 24 on 1 September.
During the climb, at a height of about 7,000ft in the vicinity of the Dutch coast, the aircraft "nearly collided" with a weather balloon, says the Dutch Safety Board.
It says the crew estimated the horizontal distance at 50-100m (160-330ft) and the vertical separation at 50m.
Dutch investigators had previously detailed a similar encounter between a KLM Boeing 777-200 and a weather balloon following take-off from Amsterdam on 16 February.
That incident took place at 15,000ft and the crew judged the separation distances involved to be much shorter than those in the Arkefly event.