Airspeed Indicator; Altimeter - Thrush Aircraft S2R-R1340 Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2R-R1340
Table 8-1: INSTRUMENT TROUBLESHOOTING CHART
PROBLEM
Pitot pressure connection
not properly connected to
pressure line from pitot
Hand fails to
tube.
respond
Pitot or static lines
clogged.
Leak in pitot or static
line.
Incorrect
indication or
Defective mechanism.
hand oscillates.
Leaking diaphragm.
Excessive vibration.
Hand Vibrates.
Excessive tubing
vibration.
Static line plugged.
Instrument fails
to operate.
Defective mechanism.
Barometric pressure not
carefully set.
Incorrect
Leaking diaphragm
indication.
Pointers out of
calibration.
8-12
AIRCRAFT MAINTENANCE MANUAL

AIRSPEED INDICATOR

PROBABLE CAUSE

ALTIMETER

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.
Effective: 01/01/08