NTSB Issues Urgent Safety Recommendations on Boeing 737 Rudder System
The NTSB has issued urgent safety recommendations for Boeing 737 rudder systems after a United Airlines incident. Moisture accumulation in actuators poses risks, affecting over 353 units since 2017.
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The National Transportation Safety Board (NTSB) has issued urgent safety recommendations regarding the rudder control system on certain Boeing 737 models, specifically the 737NG and 737MAX. This action follows an incident on February 6, 2024, where the rudder pedals of a United Airlines Boeing 737-8 became stuck during landing at Newark Liberty International Airport. Although there were no injuries or damage, the NTSB's investigation revealed that moisture accumulation in the rudder control actuators could lead to jamming or restriction of the rudder system. Testing showed that the actuators failed under cold conditions due to incorrect assembly of a sealed bearing, which allowed moisture to enter. Over 353 actuators delivered to Boeing since February 2017 are affected. The NTSB has recommended that Boeing explore alternative responses for pilots in the event of a jammed rudder, as applying maximum force could lead to dangerous situations. Additionally, the NTSB urged the FAA to assess whether the affected actuators should be removed from service and to inform international aviation regulators of the potential risks. The investigation is ongoing, and further updates may be provided as new information emerges.
- NTSB issued urgent safety recommendations for Boeing 737 rudder systems.
- Incident involved rudder pedals becoming stuck during landing.
- Moisture accumulation in actuators is a key concern.
- Over 353 actuators may be affected due to incorrect assembly.
- Recommendations include alternative pilot responses and potential actuator removals.
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2 comments Rudder control system could jam or become restricted on some 737NG and 737MAX airplanes.Related
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