Zurich, July 04: Swiss authorities recommended a week
ago that the country's air traffic control change its outmoded
RADAR system, they said, as investigators pieced together the
reasons why two planes collided over southern Germany, killing
The Swiss authority Beaa, which investigates aviation
accidents, yesterday said it had told Skyguide, the private
company in charge of air traffic control in Swiss airspace, in
a June 26 report that its radar system was imprecise and
out-of-date and should be changed.
Earlier in the day, Swiss air controllers said an
automatic warning system was shut down for maintenance when
the two planes -- a Russian passenger jet bound for Spain and
a Boeing cargo plane headed for Belgium -- slammed into each
other Monday night, killing all aboard.
Skyguide said it was asking why the air traffic
controller on duty did not intervene earlier to warn the pilot
of the Russian airliner of the accident risk, and why the
pilot only began a dive maneuver after a second warning.
Meanwhile the fourth and last black box was recovered
yesterday from the wreckage of the mid-air collision, as the
families of the victims, mostly Russian children, began
arriving in Ueberlingen on the shores of lake constance for an
emotional tour of the disaster site.
German authorities confirmed that the cockpit voice
recorder from the cargo plane, which was flying from northern
Italy to Brussels, was recovered, providing investigators with
the last vital piece of evidence.