TM 55-1510-219-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 copilot'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 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.
3-36
