Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual page 342

PIPER CHEROKEE WARRIOR SERVICE MANUAL
10-28 PITOT AND STATIC AIR SYSTEMS. (Refer to Figure 10-7.)
The pitot air system consists of a pitot mast on the underside of the left wing with its related plumbing.
Impact air pressure entering the pitot is transmitted from the pitot inlet through hoseing and tubing routed
through the wing to the airspeed indicator on the instrument panel. A partially or completely blocked pitot
head will result in erratic or zero instrument readings.
The static air system consists of interconnected static ports on the underside and aft side of the (pitot)
static mast. The ports are connected to the airspeed indicator, altimeter, and vertical speed indicator by hoseing
and tubing routed through the wing.
An alternate static air sourc e is located below the instrument panel in front of the pitot. The alternate
static source is part of the standard system. It incorporates a shutoff valve to close the port when not needed.
Pitot and static lines are drained through separate drain valves on the left lower side of the fuselage
interior.
BOTH THE PITOT AND STATIC LINES CAN BE
DRAINED THROUGH SEPARATE DRAIN
VALVES (6) LOCATED ON THE LEFT LOWER
SIDE OF THE FUSELAGE INTERIOR.
1. ALTIMETER
2. AIRSPEED INDICATOR
3. PITOT HEAT SWITCH
4. VERTICAL SPEED INDICATOR
5. PITOT PRESSURE SOURCE & LINE
6. DRAIN VALVES
7. ALTERNATE STATIC SOURCE
8. PRIMARY STATIC PRESSURE SOURCE & LINE
Revised: February 28, 1995
NOTE
Figure 10-7. Pitot and Static Air Systems
2C6
Island Enterprises
INSTRUMENTS