However, authorities say they will issue death certificates within two weeks.
Families have been told it could take up to six months to identify remains.
The record-breaking plane's debut was supposed to be a more extravagant affair open to the public, but the manufacturer limited the event to employees only following the recent Ethiopian Airlines crash involving a Boeing 737 Max 8 aircraft, reported Travel and Leisure. The French agency said in a tweet it had not listened to the audio files and that the data had been transferred to Ethiopian investigators.
As families await results from the investigation, the airline is planning to hold a service on Sunday in Addis Ababa, at the Kidist Selassie, or Holy Trinity Cathedral, where many of Ethiopia's past rulers are buried under its pink stone spires.
Flyadeal ordered 30 Boeing 737 MAX 8s last December with purchasing options for 20 more in a deal that Boeing said was worth $5.9 billion at list prices.
Ethiopian Airlines Flight 302 plummeted into a field minutes after taking off from Addis Ababa bound for Nairobi last Sunday, killing all on board.
Boeing executives and technical experts briefed pilots at USA airlines that fly the Max in November about the plane, less than a month after the Lion Air crash. The BEA also said work resumed on the flight's data recorders.
Iran can not purchase or operate Boeing 737 MAX planes due to U.S. sanctions.
However, Boeing said, in a statement, that it expects the US Federal Aviation Administration (FAA) to approve design changes to the planes' software "no later than April 2019".
Investigators in France on Friday examined the black boxes of the jet that crashed in Ethiopia as the global airline industry waited to see if the cause was similar to the disaster in Indonesia.
In both crashes, pilots asked to return minutes into flight. The pilot of that plane reported control problems.
Boeing said it supports the grounding of its planes as a precautionary step, while reiterating "full confidence" in their safety.
Montreal-based Air Canada has said it operated 75 737 MAX flights daily out of a total schedule of approximately 1,600 daily flights system-wide.
Preliminary satellite data suggests that the jet's flight path was similar to that of a Lion Air Max 8 that crashed October 29 in Indonesia.
Boeing is expected to finalize a software fix for that system within a week to 10 days, sources familiar with the matter said earlier on Saturday.
Boeing and USA air safety regulators have been at odds over how much pilot training will be required along with the software fix, the Wall Street Journal reported on Friday.
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