Turn-And-Slip Indicator; Trouble Shooting - Cessna 150 Series Service Manual

15-52. TURN-AND-SLIP INDICATOR.
is an electrically operated instrument powered by the
aircraft electrical system, therefore, operating only
15-53. DESCRIPTION. The turn-and-slip indicator
when the master switch is ON.
15-54.
TROUBLE SHOOTING.
TROUBLE
PROBABLE CAUSE
REMEDY
INDICATOR POINTER FAILS TO Internal fuse blown.
Check wiring for continuity,
RESPOND.
check voltage at indicator.
Replace fuse, if fuse still
blows, replace instrument.
Master switch "OFF" or
Check switch "ON." Replace
switch defective.
defective switch.
Broken or grounded lead to
Check circuit wiring. Repair
indicator.
or replace defective wiring.
Indicator not grounded. Check ground wire.
Repair
or replace defective wire.
Defective mechanism.
Replace instrument.
HAND SLUGGISH IN
Defective mechanism.
Replace instrument.
RETURNING TO ZERO.
Low voltage.
Check voltage at indicator.
Correct voltage.
POINTER DOES NOT INDICATE Defective mechanism.
Replace instrument.
PROPER TURN.
HAND DOES NOT SIT
Gimbal and rotor out of balance.
Replace instrument.
ON ZERO.
Hand incorrectly sits on rod.
Replace instrument.
Sensitivity spring adjustment
Replace instrument.
pulls hand off zero.
IN COLD TEMPERATURES, Oil in indicator becomes too
Replace instrument.
HAND FAILS TO RESPOND thick.
OR IS SLUGGISH.
Insufficient bearing end play. Replace instrument.
Low voltage. Check voltage at indicator.
Correct voltage.
NOISY GYRO. High voltage.
Check voltage at indicator.
Correct voltage.
Loose or defective rotor Replace instrument.
bearings.
15-18