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The changes US aircraft manufacturer Boeing has proposed in the wake of two deadly accidents of its top-selling 737 MAX aircraft were deemed "operationally suitable," according to a draft report released by US regulators Tuesday.
However, Boeing has not yet submitted a planned software fix to the Federal Aviation Administration, the agency said in a statement.
Boeing - Software - Fix - System - Crashes
Boeing has been working on a software fix for its anti-stall system following crashes in Ethiopia last month and Indonesia in October that killed nearly 350 people, both shortly after takeoff.
All 737 MAX aircraft have been banned from the world's skies since days after the Ethiopian Airlines crash on March 10, and the FAA has said it will not rush to approve the proposed fixes.
Crash - Investigators - Planes - Anti-stall - System
Crash investigators have zeroed in on the planes' anti-stall system, the Maneuvering Characteristics Augmentation System, or MCAS, which may have erroneously forced the planes down.
Boeing said it has been working on a software upgrade since late last year, and announced additional changes after last month's deadly crash.
FAA - Flight - Standardization - Board - Maneuvering
The FAA said a Flight Standardization Board evaluated "the modified Maneuvering Characteristics Augmentation System (MCAS)" and said the "system was found to be operationally suitable."
Report - Differences - MAX - Models - Training
The report, which notes the differences in the MAX compared to prior 737 models, and any new training requirements, will be open for public comment for 14 days.
"After that, the FAA will...
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