The white A/T LIM symbol appears on the upper display unit. What is correct?
A.A.The A/T has reach the thrust limit for the selected assumed temperature
B.B.The N1 has been manually set and not by the FMC, therefore the A/T LIM will be illuminated
C.C.The A/T is using the upgraded BLT performance information
D.D.The FMC is not providing A/T with N1 limit values
正确答案是D