TROUBLESHOOTING GUIDE B -
Airspeed indicator reading remains fixed.
Pilot pressure line clogged with ice or debris.
Vertical velocity indicator inaccurate or inoperative.
Static line clogged
Leak in line or Instrument case or loose fit-
Defective vertical velocity indicator.
Airspeed indicator reads incorrectly or fluctuates
Pilot tube or pressure line partially restrict-
ed or leaking.
Static port or line clogged or static line leak-
Faulty airspeed indicator.
Magnetic compass inaccurate, sluggish or erratic.
a. Insufficient liquid
External magnetic interference
c. Defective compass
Windshield heat on
Turn-and-slip indicator inoperative or erratic.
a. Tripped turn-and-slip circuit breaker.
b. Defective turn-and-slip instrument.
Fuel quantity indicator fluctuates or reads low.
a. Defective pins in connector on harness that
mates with gage.