K14. Marker beacon indicator light does not illumi-
a. Defective marker beacon indicator light.
b. No power to receiver.
c. Defective antenna or cabling.
d. Defective marker beacon off/volume control
on audio control panel.
e. Defective marker beacon receiver.
K15. Marker beacon signals not heard in headset.
a. Defective audio control panel.
b. Defective marker beacon off/volume control
or sensitivity switch on audio control panel.
K16. Glideslope off flags remain in view when glide-
slope receiver is operating.
a. Glideslope portion of VOR receiver defec-
b. Defective glideslope antenna or cabling.
c. Defective VOR control panel.
K17. Glideslope off flag on one course deviation indi-
cator remains in view when glideslope receiver is
a. Defective pilot's or copilot's VOR switch on
b. Defective course deviation indicator switch-
c. Defective course deviation indicator.
K18. Glideslope indicator on course deviation indica-
tors do not deflect properly.
a. Defective glideslope portion of VOR receiv-
K19. Glideslope indicator on one course deviation in-
dicator does not deflect properly.
a. Defective course deviation indicator.