Mooney M20B - Page 84

´•rrb
i.
r~able
7 INSTRUMENT
TROUBL~SHOOTZNG
rraovBLE CAIISE
I
COMPASS
Excessive
card
error
Compass
not
properly
Compensate
Instrument.
compensated.
~xternalMagnetic
I
Locate
Magnetic
interference
and
Interference.
eliminate if
possible.
Excessive card
Improper
mounting
an
Align
instrumenC.
oscillation
panel
Insufficient
Inquid.
~I
R~lade
instniinent.
cara’Sluggish.
Weak
card
magnets.
Rei~lace
instrument.
Excessive
pivot
~iction
or
R~place
instrument.
broken
jewel.
Iastnun~ent
too
heavily
Remove
excess
compensation.
compensated.
Liquid
leakag’e.
Loose
bezel
screws.
j
Replace
instrument.
Broken
cover
glass.
Replace
iristrument.
Defective
sealing
Fa~kats.
Replace
instrument
Discolored luminous mark-
Age.
I
Replace
instnunent.
inks
or
dainping
liquid.
Defective
light.
Burnt
out
lamp
or
broken
b
Check
lamp
or
continuity
of
wiring.
circuit.
TACHOMETER
No
reading
on
indicator
Broken
Shaft.
Replace
instrument.
eifhg
permanent
or
inter;
mittent.
I
Springs
weak
I
Replace
instrument.’
Pointer oscillates
Rough
spot
on,
or
sharp
Repair
or
replace.
1 excessively.
bend
in
~haft
Excessive friction in
Rey.iace
instrument.
I---i~tntment.
-69-
OLDWILLWAYNE