ANOTHER Boeing 737 Max fiasco? Plane landing at Newark Airport had 'stuck' rudder pedal issue - following a litany of safety failings that sparked $30BILLION market selloff

Boeing is under further scrutiny over safety issues, after federal regulators said they are investigating another issue involving a 737 Max plane. 

The National Transportation Safety Board (NTSB) said on Thursday it is probing a United Airlines Boeing 737 Max 8 flight last month that experienced 'stuck' rudder pedals during the landing rollout.

The NTSB said in a preliminary report on the February 6 flight that the plane taxied to the gate at Newark Airport without incident and there were no injuries to the 161 passengers and crew.

It reported that the captain said that during the landing rollout, the rudder pedals did not move in response to 'normal' application of foot pressure while attempting to maintain the runway centerline.

Boeing has been under scrutiny in recent months after a January 5 mid-air blowout on another plane model, a Boeing 737 Max 9, during an Alaska Airlines flight. 

The National Transportation Safety Board (NTSB) said on Thursday it is probing a United Airlines Boeing 737 MAX 8 flight last month that experienced 'stuck' rudder pedals (file photo)

Shares of Boeing remain down more than 18 percent from their price before the Alaska Airlines incident, representing a loss of nearly $30 billion from the company's market capitalization. 

Boeing, the Federal Aviation Administration and United did not immediately respond to requests for comment. 

Last month, the FAA formally mandated inspections in Boeing 737 Max airplanes for loose bolts in the rudder control systems after the plane maker recommended them in December.

The NTSB report said the captain said that in the Max 8 flight last month the pedals remained 'stuck' in their neutral position.

The captain used the nosewheel steering tiller to keep the airplane near the runway centerline while slowing to a safe speed before exiting the runway onto a high-speed turn-off, the report said.

The NTSB said the captain asked the first officer to check his rudder pedals and the first officer reported the same problem. The captain said that shortly thereafter the rudder pedals began to operate normally.

Three days after the incident, United conducted a test flight and was able to duplicate the reported rudder system malfunction identified during the incident on the same plane.

The NTSB was notified of the flight control issue after the flight test result and opened an incident investigation.

Boeing has been under scrutiny in recent months after a January 5 mid-air blowout on another plane model, a Boeing 737 MAX 9, during an Alaska Airlines flight 

Meanwhile, the head of the NTSB has accused Boeing of failing to provide some key records sought in its ongoing investigation into the Alaska Airlines 737 Max mid-air emergency.

NTSB Chair Jennifer Homendy said investigators have sought the names of the 25 people who work on door plugs at a Boeing facility in Renton, Washington, but have not received them from Boeing.

'It is absurd that two months later we don't have it,' Homendy said at a Senate Commerce Committee hearing on Wednesday.

Boeing insisted that it had initially provided the NTSB with some of the names of Boeing employees, including door specialists it believed would have relevant information.

'We have now provided the full list of individuals on the 737 door team, in response to a recent request,' the planemaker said, adding, 'if the door plug removal was undocumented there would be no documentation to share.'