U.S. Pilots in recent months have filed several complaints about the Boeing 737 Max 8, thus putting additional scrutiny after a second deadly crash in six months.
According to Politico, the pilots filed at least five separate anonymous complaints in the federal database on aviation incidents.
The pilots complain about issues with the aircraft’s autopilot system and described the plane abruptly nosing down. The issues took place during the ascent and takeoff, according to the reports.
The flights referenced took place in October and November, The Dallas Morning News reported.
Politico reported that at least one complaint cited an anti-stall system that has been a subject of interest following the latest crash involving the aircraft.
“The fact that this airplane requires such jury-rigging to fly is a red flag,” one pilot wrote.
A Federal Aviation Administration (FAA) spokesman told the news outlet that the reports were filed directly to NASA, which serves as a neutral third party in the reporting process.
The European Union, China, and Australia already announced they are grounding Boeing 737 MAX 8 airplanes.
An Ethiopian Airlines Boeing 737 MAX 8, en route from Addis Ababa to Kenya’s Nairobi, crashed near the Ethiopian town of Bishoftu. Contact with the aircraft was lost six minutes after takeoff, the airline said. All 157 passengers and crew members on board the plane died.
On Tuesday, Russian airlines, including Globus (part of S7 Group), said they did not plan to abandon existing delivery contracts for Boing 737 MAX planes.