The boss of Ethiopian Airlines has called for the grounding of all Boeing’s 737 Max 8 aircraft until it is established they are safe to fly.
Many countries have already suspended the plane after one the airline’s jets crashed on Sunday minutes after take-off, killing all 157 people on board.
Tewolde Gebremariam told the BBC that although the exact causes were still unknown, there were similarities to a Lion Air crash last October.
But US officials say the jet is safe.
The Federal Aviation Administration (FAA) said a review had showed “no systemic performance issues” and that there was no basis for grounding the aircraft.
Sunday’s Nairobi-bound plane was the same type as the Indonesian Lion Air jet that crashed in October, killing 189 passengers and crew, and Mr Tewolde said there were other similarities.
He accepted that Boeing and the FAA must have their reasons for arguing that the 737 Max 8 is safe. But “extreme precaution” was needed and “all of us who have grounded the plane have very good justification,” Mr Tewolde said.
Both aircraft were brand new and in both cases there were problems minutes after take-off, he said.