Airspeed Indicator; Altimeter - THRUSH S2R – G10 Maintenance Manual

AIRCRAFT MAINTENANCE MANUAL
Table 8-1: INSTRUMENT TROUBLESHOOTING CHART
PROBLEM
Hand fails to
respond
Incorrect
indication or
hand oscillates.
Hand Vibrates.
Instrument fails
to operate.
Incorrect
indication.
Effective: 03/26/2010
THRUSH AIRCRAFT, INC – MODEL S2R-G10

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.
Barometric pressure not
carefully set.
Leaking diaphragm
Pointers out of
calibration.
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 to local barometric
pressure.
Substitute known-good altimeter and
check reading. Replace instrument.
Compare reading with known-good
altimeter. Replace instrument.
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