Pitot-Static System; Heating And Ventilating System - Piper CHEROKEE CRUISER PA-28-140 Information Manual

CHEROKEE CRUISER
PITOT-STATIC SYSTEM
The system supplies both pitot and static pressure for the airspeed indicator, altimeter and
vertical speed indicator (when installed).
Pitot and static pressure are picked up by the pitot head on the bottom of the left wing.
To prevent bugs and water from entering the pitot and static pressure holes, when the
airplane is parked, a cover should be placed over the pitot head. A partially or completely
blocked pitot head will give erratic or zero readings on the instruments.
NOTE
During the preflight, check to make sure the pitot cover is
removed.
HEATING AND VENTILATING SYSTEM
Heat for the cabin interior and the defroster system is provided by a heater muff attached
to the exhaust system. The amount of heat desired can be regulated with the controls located
on the far right side of the instrument panel. If unusual odors are noticed, the heat should be
shut off and the system inspected for leaks. The airflow may be regulated between the front and
rear seats by the use of the levers located on top of the heat ducts next to the control console.
CAUTION
When cabin heat is operated, heat duct surface becomes hot. This
could result in burns if arms or legs are placed too close to heat duct
outlets or surface.
Fresh air inlets are located in the leading edge of the wing at the intersection of the tapered
and straight sections. A large adjustable outlet is located on the side of the cabin near the floor
at each seat location; overhead air outlets are offered as optional equipment. Cabin air is
exhausted through an outlet located below the rear seat floor panel. A cabin air blower, which
helps to distribute fresh air through the cabin, is available as optional equipment when air
conditioning is not installed. This blower is operated by a "FAN" switch with 4 positions -
OFF," "LOW," "MED," or "HIGH."
2-14
On the Flite Liner, overhead air outlets are not offered as optional equipment.
AIRPLANE AND SYSTEMS
REVISED: APRIL 16, 1979