Why Certain Boeing 737 Variants Are Under Scrutiny
Investigated for issues related to a jammed or restricted rudder control system in models with a 'rudder rollout guidance actuator.'
Following an incident on February 6, 2024, where rudder pedals were unresponsive during landing, the United States National Transportation Safety Board (NTSB) issued safety alerts to Boeing and the Federal Aviation Administration (FAA).
Findings from the NTSB Investigation
Pilots experienced stuck rudder pedals, requiring alternative control methods.
Data confirmed malfunction; significant pedal force didn’t move the rudder.
Testing revealed jamming and moisture/corrosion issues linked to a manufacturing error.
Function of the Rudder Rollout Guidance Actuator
This actuator assists the autopilot in maintaining control during specific instrument landing system (ILS) approaches, particularly in low visibility conditions (CAT IIIB).
It enables the aircraft to land automatically while maintaining directional control, especially important during adverse weather.
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