US FAA Proposes Requiring Key Boeing 737 MAX Design Changes

WASHINGTON—The U.S. Federal Aviation Administration said on Monday it is proposing requiring four key Boeing Co. 737 MAX design changes to address safety issues seen in two crashes that killed 346 people and led to the planes grounding in March 2019.

The agency is issuing a proposed airworthiness directive to require updated flight-control software, revised display-processing software to generate alerts, a revision of certain flight-crew operating procedures and changes in the routing of some wiring bundles.

The announcement is a significant step in the U.S. planemakers long-delayed efforts to return the 737 MAX to U.S. service.

But there are still a number of hurdles, including collecting public comments on the changes for 45 days, and finalizing a new set of pilot-training procedures. Transport Canada and Europes EASA have their own concerns.

Given the work left, it remains unclear whether U.S. flights will resume before year-end.

Boeing shares were up 2.7 percent on Monday.

In response to the FAAs proposal, Chicago-based Boeing said it was “continuing to make steady progress towards the safe return to service, working closely with the FAA and other global regulators.”

The FAA said in a separate 96-page report on Monday it “has preliminarily determined that Boeings proposed changes to the 737 MAX design, flightcrew procedures and maintenance procedures effectively mitigate the airplane-related safety issues.” The airworthiness directive seeks to require Boeing changes.

The crisis over the grounding of the once top-selling 737 MAX has cost the U.S. planemaker more than $19 billion, slashed production and hobbled its supply chain, with criminal and congressional investigations still ongoing.

The FAAs review has taken more than 18 months and included more than 40 full-time engineers, inspectors, pilots, and technical support staff. To date, the FAA has conducted more than 60,000 hours of review, certification testing, and document evaluation.

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