France's AFP news agency said the rollout, which will come in the next ten days, would focus on the MAX's automatic stall-prevention system that was linked to the Lion Air crash in Indonesia, but has not yet been proven to have caused Sunday's Ethiopian Airlines ET 302 disaster. Reuters reported Friday, however, that the timeline for the software fix "has not changed" and will be installed "in the coming weeks".
Boeing shares were marked 1.52% higher Friday to close at $378.99 each.
France's Bureau of Enquiry and Analysis for Civil Aviation Safety said Thursday it had received details of the so-called 'Black Box' recorder from Sunday's fatal crash of Ethiopian Airlines Flight 302.
However, the BEA said it couldn't say how long it would take to analyse the voice and data information until it can determine the damage from the box itself.
The U.S. Federal Aviation Administration said Wednesday that "new evidence" collected at the crash site compelled it to ground all "Boeing 737 MAX aircraft operated by U.S. airlines or in U.S. territory", reversing an earlier statement on the plane's safety.
"The grounding will remain in effect pending further investigation, including examination of information from the aircraft's flight data recorders and cockpit voice recorders," the agency added. "An FAA team is in Ethiopia assisting the NTSB as parties to the investigation of the Flight 302 accident. The agency will continue to investigate."