TM 55-1510-221-MTF
K13. 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 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 flag on one course deviation indicator remains in
view when glideslope receiver is operating.
a. Defective pilot's or copilot's NAV select 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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