On 27 December 2022, the NTSB released its comments on the accident separately from the final report, saying that the Ethiopian authorities failed to include them in or append them to their report.[80] The NTSB's comments read in part:[81]
Overall, the US team concurs with the EAIB's investigation of the MCAS and related systems and the roles that they played in the accident. However, many operational and human performance issues present in this accident were not fully developed as part of the EAIB investigation. These issues include flight crew performance, crew resource management (CRM), task management, and human-machine interface. It is important for the EAIB's final report to provide a thorough discussion of these relevant issues so that all possible safety lessons can be learned.
The BEA also submitted comments to the draft final report, in which it disagrees with some aspects of the Ethiopian findings, specifically regarding crew performance. The introduction to the BEA's comments reads in part:[82]
The BEA globally agrees with the analysis of the crew performance for phases 4 and 5 of the accident scenario. However, the BEA considers that some aspects of the analysis of the crew performance in the first phases of the flight are insufficiently developed and could improve the understanding of what could have been done by the crew which could have modified the outcome of the flight.