Due to possible failures in tim contrológlue no provided by Collins Aerospace, The FAA recommendedó I reviewed itón of the Boeing 737of and 737 MAX.
The National Transportation Safety Board (NTSB) has issued urgent security recommendations to The Boeing Company and the Administrationón Federal Aviationón (FAA) after an incident involvingó a possible jamming of the tim control systemón is a Boeing 737-8 from United while taking off in Newark.
The incident, what happenedó during the braking process after landing at Newark Liberty International Airport, has led the NTSB to investigate the underlying causes and possible risks associated with this problem.
Details of the incident and investigationón on the 737NG and MAX
The NTSB isá investigating an incident 6 February 2024 that involvedó still Boeing 737 MAX 8 de United Airlines. During landing taxi, the tim pedalsóno left «stuck» in his positionón neutral, what difficultó the pilot control the directionón of the avión. Fortunately, the captainácould not use the timóaddress numberón of the front wheel to maintain control and avoid any serious consequences.
An investigationón posterior reveló what was thereíMoisture has accumulated inside the gu actuatorsíto of the timón, what I committedíto its functionality. This problem dates back to a manufacturing error.ón what did I leaveó Actuators susceptible to moisture ingress.
NTSB investigators tested one of the tim control componentsón of the avión crashed, a gu actuatoría, at the component manufacturer, Collins Aerospace. When it was testedó the incident actuator and a unit idéstory from another planeón in a fr environmentíO, the functionón of the actuators were significantly compromised.
Investigators found evidence of moisture on both actuators, who did not pass the test. Collins Aerospace determinó after a sealing component was assembledó incorrectly during productionón of actuators, what he leftó the unsealed side más susceptible to moisture that can freeze and limit movement of the tim systemón.
Collins notificó a Boeing that más de 353 actuators that Collins hadídelivered to the manufacturer since February 2017, were affected by this conditionón.
gu actuatoría tim releaseón, what isá installed on the tail of some Boeing 737NG and 737MAX aircraft, Eastá diseñdesigned to control the movement of the timón during approach operationsón, landing and taxiing in categoryíto IIIB. Although it is not used in non-precision landings.ón, the actuator remains engaged mecháonly with the tim systemón.
The flight manual 737 from Boeing indicates to pilots that they are facing a timóaddress numberón stuck or restricted “master stuck or restricted system [using] the force máxima, including a combined effort from both drivers”. NTSB Expressó your concernón that this amount of force applied during landing or takeoff couldíto result in a large input on the tim pedalsóaddress numberón and a deviationósudden n, big and unwanted timóaddress numberówhat caníto unintentionally cause péloss of control or departure from the runway.
security recommendations
In light of these findings, The NTSB has issued several safety recommendations to Boeing and the FAA. These recommendations include:
Boeing:
- Determine additional crew responsesóflight number for tim situationsón stuck or restricted más allá to apply the mámaximum pedal force.
- Notify operating flight crews 737 with actuators affected by the potential for jamming due to moisture.
FAA:
- Evaluate whether actuators with incorrectly assembled bearings should be removed from aircraft.
- If required, instruct US operators to remove affected actuators until it iséReplacements are not available.
- Notify aviation regulatorsón of others paíabout the problem and encourage them to take similar steps.
The investigationóNTSB No. on Potential Timing Control Problemsón on airplanes Boeing 737 highlights the importance of supervisionón continuous safety and proactive measures to prevent accidents. The recommendations issued by the NTSB are critical stepsíethics to address this concernósafety and guarantee the operationón continued safety of these aircraft.
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