Marker beacon indicator light does not illuminate

TM 55-1510-21-MTF

K14. Marker beacon indicator light does not illumi-

nate.

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-

tive.

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

operating.

a. Defective pilot's or copilot's VOR switch on

instrument panel.

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-

er.

K19. Glideslope indicator on one course deviation in-

dicator does not deflect properly.

a. Defective course deviation indicator.

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