For flights ET 302 and JT 610, investigators determined that MCAS was triggered by falsely high AoA inputs, as if the plane had pitched up excessively. On both flights, shortly after takeoff, MCAS repeatedly actuated the horizontal stabilizer trim motor to push down the airplane nose.[15][16][17][18] Satellite data for the flights showed that the planes struggled to gain altitude.[19] Pilots reported difficulty controlling the airplane and asked to return to the airport.[20][21] The implementation of MCAS has been found to disrupt autopilot operations.[22]