TM 55-1510-220-MTF
a.
Defective gyroscopic compass set.
b.
Incorrect compass deviation card.
c.
Compass switch not in SLAVE position.
K26.
Copilot's radio magnetic indicator heading does not agree with pilot's horizontal situation
indicator heading within two degrees.
a.
Defective radio magnetic indicator.
b.
Defective horizontal situation indicator.
K27.
Pilot's radio magnetic indicator heading does not agree with co pilot's horizontal situation
indicator heading within two degrees.
a.
Defective radio magnetic indicator.
b.
Defective horizontal situation indicator.
K28.
VOR receiver inoperative.
a.
No power to equipment.
b.
Defective VOR control panel.
c.
Defective VOR receiver.
K29.
With VOR receiver operating, course deviation bars on course deviation indicators and radio
magnetic indicator needles do not deflect.
a.
Defective VOR receiver.
b.
Defective VOR control panel.
c.
Defective NAV switching relay.
K30.
With VOR receiver operating, course deviation bars on course deviation indicators do not
deflect (radio magnetic indicator needles operate properly).
a.
Defective VOR switch on instrument panel.
b.
Defective course deviation indicator switching relay.
K31.
Radar inoperative.
a.
System circuit breaker tripped.
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