In this 2019 photo, a Boeing 737 Max airplane being built for Norwegian Air International taxis for a test flight at Renton Municipal Airport in Renton. (AP Photo/Ted S. Warren, File)

In this 2019 photo, a Boeing 737 Max airplane being built for Norwegian Air International taxis for a test flight at Renton Municipal Airport in Renton. (AP Photo/Ted S. Warren, File)

FAA tells Boeing more training for 737 Max pilots may be needed

Some pilots were confused about how the autopilot behaved and failed to finish emergency checklists.

By Alan Levin / Bloomberg News

WASHINGTON — U.S. regulators have told Boeing Co. that pilots may require additional training to properly respond to emergencies on the 737 Max after airline crews failed to perform proper procedures in simulator tests.

In a Feb. 19 letter to Boeing reviewed by Bloomberg News, the Federal Aviation Administration detailed multiple missteps that airline crews had made in the December simulator sessions and said additional tests are needed. The simulations replicated failures similar to those in two fatal crashes.

An analysis of the results by FAA and regulators in other nations reviewing revisions to the grounded jetliner may prompt “additional training requirements pertaining to the” aircraft, the letter said.

As a result of the tests, Boeing had already reversed its long-held position that Max pilots who were certified to fly on earlier versions of the 737 didn’t need extra simulator training. But the letter provides more detail about issues raised in the sessions and is the first indication that the government is also examining the need for more training requirements.

It is the latest complication for Boeing’s efforts to bring the 737 Max — its best-selling jet — back into service almost a year after it was grounded worldwide after the crashes. Decisions on training are important because they could delay the plane’s return and be costly for airlines.

“We have submitted an initial recommendation regarding simulator training on the737 Max, but we will continue to work with airline customers and global regulators to assess and finalize the content of the training,” Boeing said in an emailed statement. “Ultimately, it will be the regulators who determine the training requirements.”

Pilots from the three U.S. carriers that fly the Max, American Airlines Group Inc., United Airlines Holdings Inc. and Southwest Airlines Co., along with a crew from Grupo Aeromexico SAB were tested in December simulations of multiple emergency scenarios.

The tests were conducted in a simulator running Boeing’s updated flight-control system that was developed in the wake of the crashes. While none of the crews committed such egregious mistakes that they lost their planes, the errors were extensive, according to the FAA letter.

The pilots, who had received additional training proposed by the company, failed to finish emergency checklists related to the automated system involved in both 737 Max crashes, known as Maneuvering Characteristics Augmentation System.

In addition, they had difficulty with emergency procedures related to sensor failures, erroneous altitude and airspeed readings and the autopilot, among others, according to the letter.

The tests also showed that some pilots were confused about how the autopilot behaved in some circumstances and their interactions with the plane’s automated warning systems were distracting.

The FAA said it had asked members of the Joint Operations Evaluation Board — made up of pilot-training experts from the agency as well as Europe, Canada and Brazil — to perform similar reviews.

The tests are part of federal requirements that airliner systems must be relatively intuitive and average pilots can perform the procedures necessary to respond to failures and emergencies.

The effort is part of a multistep process of evaluating training requirements for the plane. The FAA is taking the lead, but regulators such as the European Aviation Safety Agency are working with the agency and performing their own assessments.

“The agency is following a thorough, deliberate process to verify that all proposed modifications to the Boeing 737 Max meet the highest certification standards,” the agency said in a statement.

The FAA is working with aviation regulators in other nations and will take as much time as it required, the agency said.

The crashes of two 737 Max jets — in October 2018 near the coast of Indonesia and in March 2019 in Ethiopia — killed 346 people, led to the prolonged grounding and prompted massive upheaval at Boeing.

Boeing is already in the process of expanding training following its Jan. 7 announcement that it backed mandatory simulator sessions for pilots transitioning from the popular 737 Next-Generation models to the Max.

The plane manufacturer originally had sold the Max as an updated version of its 737 and so similar to earlier models that pilots only needed a short training course on an iPad.

However, the pilots in the simulator sessions in December had been given a revised training course and still made multiple missteps, showing that more was needed.

Boeing’s January decision makes it almost certain that regulators in the U.S., Europe and elsewhere will mandate simulator training, though they haven’t yet made a decision.

(With assistance from Julie Johnsson.)

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