Cub Crafters CC18-180 Maintenance Manual page 267

2. TROUBLESHOOTING
PROBLEM - PITOT STATIC
- Low or sluggish airspeed
indication
- Normal altimeter and
vertical speed indication
- Incorrect or sluggish
response on all three
pitot-static instruments
- Pitot tube does not get
Hot
PROBLEM – ALTIMETER
- Excess scale error
- Excessive pointer oscillation
- High reading
PROBLEM – AIRSPEED
INDICATOR
- Pointer fails to respond
- Indicates improperly or
oscillates
Manual number TC100000AMM
Date: 7/12/06
CUB CRAFTERS, INC.
CC18-180 MAINTENANCE MANUAL
PROBABLE CAUSE
- Pitot tube deformed
- Leak or obstruction in pitot
line
- Leaks or obstruction in
static line
- Circuit breaker out
- Break in wiring
- Insufficient current
- Heating element burned
out
PROBABLE CAUSE
- Improper calibration
adjustment
- Defective instrument
- Static system leak
PROBABLE CAUSE
- Leak in instrument case
- Obstruction in pitot line
- Leak in pitot or static lines
- Alternate static source
valve open
REMEDY
- Repair or replace
damaged component
- Repair or replace line
- Remove obstruction
- Reset circuit breaker
- Test and repair wiring
- Check current drain of
element
- Replace element
REMEDY
- Repair or replace
damaged component
- Replace or repair
instrument
- Inspect static system
REMEDY
- Replace or repair instrument
- Check line for obstruction
- Replace lines on Gauge
and blow out lines
- Repair or replace damaged
lines
- Tighten connections
- Close for normal operation
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