While performing the LANDING checklist the PSEU light illuminates on recall. This indicates:
A.A.A normal condition
B.B.A fault is detected in the landing gear locking system or the air/ground sensing systems.
C.C. The landing gear configuration warning horn will sound upon landing.
D.D. A problem exists in the PSEU system because the light should be inhibited in flight.
正确答案是D