TM 55-1510-220-MTF
a.
Defective VOR receiver.
b.
Defective VOR control panel.
c.
Defective audio control panel.
K14.
Marker beacon indicator light does not illuminate.
a.
Defective marker beacon indicator light.
b.
No power to receiver.
c.
Defective antenna or cabling.
d.
Defective marker beacon receiver.
K15.
Marker beacon signals not heard in headset.
a.
Defective audio control panel.
b.
Defective marker beacon volume control or sensitivity switch on pedestal extension.
K16.
Glideslope off flags remain in view when glideslope receiver is operating.
a.
Glideslope portion of VOR receiver defective.
b.
Defective glideslope antenna or cabling.
c.
Defective VOR control panel.
K17.
Glideslope off flag on one course deviation indicator 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 switching relay.
c.
Defective course deviation indicator.
K18.
Glideslope indicator on course deviation indicators do not deflect properly.
a.
Defective glideslope portion of VOR receiver.
K19.
Glideslope indicator on one course deviation indicator does not deflect properly.
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