Boeing's latest snag: Are pilots strong enough to turn a crank in an emergency?
The manual crank in a Boeing 737 MAX simulator on June 6. Photo: Andriana Mereuta for The Wall Street Journal By Andy Pasztor and Andrew Tangel Updated June 19, 2019 5:53 am ET LE BOURGET, France—Efforts to get Boeing Co.’s BA 5.37% 737 MAX jetliners back in the air have been delayed in part by concerns about whether the average pilot has enough physical strength to turn a manual crank in extreme emergencies.
The analysis has been further complicated because the same emergency procedure applies to the generation of the jetliner that preceded the MAX, known as the 737 NG. About 6,300 of these planes are used by more than 150 airlines globally and they are the backbone of short- and medium-range fleets for many carriers.
How the 737 MAX Became Boeing’s Fastest-Selling Plane Boeing’s 737 MAX evolved to meet surging international demand for air travel and in the process became its top-selling plane. WSJ’s Jason Bellini looks at how the grounding of the fleet following the Ethiopian Airlines crash could have a significant impact on Boeing’s future.
Speaking before the Paris Air Show here this week, Boeing Chief Executive Dennis Muilenburg said he wanted to conduct an “end-to-end, comprehensive review of our design and certification processes,” as well as other matters. Simulator sessions and flight tests have measured the strength required to turn the crank in various flight conditions for pilots of both genders, according to two of the people briefed on the details.
The emergency procedure under scrutiny is the final step in a checklist to counteract dangerous horizontal stabilizer movements that can be prompted by a range of causes including an MCAS malfunction.
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