Cub Crafters CC18-180 Maintenance Manual page 269

minute, the leakage should not exceed 10 m.p.h. (8.7 kts) (decrease in
differential pressure of approximately 0.15 inches of mercury or 2.04 inches of
water).
To avoid rupturing the diaphragm of the airspeed indicator, apply pressure slowly and do
not build up excessive pressure in the line. Release pressure slowly to avoid damaging
(d) If the airspeed indicator reading declines, check the system for leaky hoses and
loose connections.
(e) Inspect the hoses for signs of deterioration, particularly at bends and at the
connection points to the pitot mast and airspeed indicator. Replace any hoses
that are cracked or hardened. Any time a hose is replaced, perform a pressure
check.
(f) Unseal the drain hole and disconnect the equipment.
Manual number TC100000AMM
Date: 05/20/08
CUB CRAFTERS, INC.
CC18-180 MAINTENANCE MANUAL
CAUTION:
the airspeed indicator.
CAUTION
Do not apply suction to pitot lines.
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