The NTSB says Boeing and the FAA need to warn carriers about potential issues that could cause rudder systems on 737 Max and NG jets to malfunction.
By Lori Aratani, The Washington PostA Boeing 737 Max jet prepares to land at Boeing Field following a test flight in Seattle.
As part of the probe, NTSB investigators tested one of the rudder control components from the airplane, known as a rollout guidance actuator. After testing the actuator and an identical unit from another airplane in a cold environment, they found both had “significantly compromised” ability to function, including excessive moisture.
Boeing’s 737 flight manual instructs pilots who encounter issues with the rudder system to use maximum force to “overpower” the system. But if that type of force is applied during landing or rollout, it could cause problems, including “a sudden, large, and undesired rudder deflection that could unintentionally cause loss of control or departure from a runway,” the agency warned.
In statements, the FAA said it will convene a corrective action review board to determine next steps, while
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