Russian President Vladimir Putin has started the second day of his visit to Buenos Aires, where a G20 summit is taking place, with a working breakfast with German Chancellor Angela Merkel. However, about an hour into the flight, as the aircraft was overflying the Netherlands, technical problems surfaced, forcing the aircrew to divert and land at Cologne-Bonn airport.
He also said that the back of the Buenos Aires government delegation will take another plane, the air force of Germany.
The delay means that she will miss scheduled meetings with world leaders.
Air force Col. Guido Henrich said the problem was caused by the failure of an electrical distributor box, which affected the radio system and also a fuel system, meaning that the plane couldn't dump fuel.
The Airbus A340 government aircraft is named Konrad Adenauer after West Germany's post-war chancellor.
Former US president George HW Bush dead at 94
George Herbert Walker Bush , the 41st president of the United States and father to the 43rd president - George W. He also served as a congressman, Central Intelligence Agency director and Ronald Reagan's vice-president.
Merkel's spokeswoman later stressed that there was never any "danger to life and limb" of those aboard. Threat to the passengers on Board the plane "Konrad Adenauer" was not, she assured. Fire trucks with blue lights waited on the runway as the plane landed 30 minutes later before taxiing to the military area of the airport.
Last year Defence Minister Ursula von der Leyen took an Airbus A400M to Lithuania to show off the new transport aircraft, but engine trouble grounded it and forced her to return home on a decades-old Transall C-160 transporter.
It is not the first time the plane has suffered problems, the BBC reported.
Delegation sources said efforts were underway to organise new flights for Merkel and Finance Minister Olaf Scholz, possibly on a commercial carrier.