During a recent technical review, Boeing has identified a problem with the software on the 737 Max designed to monitor the performance of other systems during aircraft startup.
The issue is relatively minor and unrelated to the MCAS (Flight control system) that was identified as factors leading to two crashes.
The issue involves software that monitors various other systems and ensures those systems come on line properly at startup when electricity is run through the aircraft, either via ground power or using the Max’s auxiliary power unit.
Boeing identified the issue during a final review of the Max by the Federal Aviation Administration prior to certification.
“We are aware of this issue,” Boeing says in a 17 January statement. “We are making necessary updates and working with the FAA on submission of this change, and keeping our customers informed.”
This may further delay the MAX back into service…