Instrument Troubleshooting Chart; Airspeed Indicator; Altimeter - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT INC – MODEL S2RHG-T34 TURBO THRUSH

INSTRUMENT TROUBLESHOOTING CHART

PROBLEM
Hand fails to respond
Incorrect indication
or hand oscillates.
Hand Vibrates.
Instrument fails to
operate.
Incorrect indication.
8-8
AIRCRAFT MAINTENANCE MANUAL

AIRSPEED INDICATOR

PROBABLE CAUSE
Pitot pressure
connection not
properly connected to
pressure line from pitot
tube.
Pitot or static lines
clogged.
Leak in pitot or static
line.
Defective mechanism.
Leaking diaphragm.
Excessive vibration.
Excessive tubing
vibration.

ALTIMETER

Static line plugged.
Defective mechanism.
Hands not carefully
set.
REMEDY
Test line and connection for leaks.
Repair or replace damaged line,
tighten connections.
Check line for obstructions. Blow
out lines.
Test lines and connections for
leaks. Repair or replace
damaged lines, tighten
connections.
Substitute known-good
instrument and check reading.
Replace instrument.
Substitute known-good
instrument and check reading.
Replace instrument.
Check instrument mounting
screws. Tighten mounting
screws.
Check clamps and lines
connections for security. Tighten
clamps and connections.
Check line for obstructions.
Check static source. Blow out
lines. Clean static source.
Substitute known-good altimeter
and check reading. Replace
instrument.
Reset hands with know.
Effective: 05/05/04