Piper PA-32R-301T SARATOGA S, Maintenance Manual

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NAVIGATION AND PITOT/STATIC
GENERAL
Instrument air system consists of pitot air and static air sources. System supplies both pitot and static air
pressure for airspeed indictor, altimeter and vertical speed indicator. These instruments are face mounted.
DESCRIPTION AND OPERATION
Pitot air system consists of a pitot mast located on underside of left wing, with its related plumbing. Ram
air pressure entering pitot is transmitted from pitot inlet through hose and tubing routed through wing to
airspeed indicator on instrument panel. A partially or completely blocked pitot head will give erratic or
zero reading on instruments.
Static air system consists of a static port located on bottom of pitot mast. Static port is directly connected
to airspeed indicator, altimeter and rate of climb indicator on instrument panel by means of hose and tub-
ing routed through wing along with pitot line. An alternate static air source is located below instrument
panel in front of pilot. Alternate static source is part of standard system and has a shutoff valve which clos-
es port when it is not needed. A placard giving instructions for use is located on instrument panel. Pitot and
static lines can be drained through separate drain valves located on left lower side of fuselage interior.
REMOVAL AND REPLACEMENT OF FACE MOUNTED INSTRUMENTS
Since all instruments are mounted in a similar manner in PA-32R-301 SP and PA-32R-301T SP , a descrip-
tion of a typical removal and installation is provided as a guide for removal and installation of instruments
in those model airplanes. Special care should be taken when any operation pertaining to instruments is
performed.
1. Remove face panel by removing screws from around perimeter of panel.
2. With face panel removed, mounting screws for individual instruments will be exposed. Remove
connections to instrument prior to removing mounting screws of instrument to be removed.
– NOTE –
Tag instrument connections for ease of installation.
3. Installation of instruments will be completed by reversing instructions. After instal- lation is completed
and before replacing instrument face panel, check all components for security and clearance of control
column.
Instruments installed in PA-32R-301 II HP airplanes are back mounted on a solid metal instrument panel.
These instruments must be removed from the back of the panel.
REMOVAL AND REPLACEMENT OF CLUSTER MOUNTED INSTRUMENTS
A cluster, located on instrument panel, contains five individual instruments. Removal of these instruments
can be accomplished by the following procedure:
1. Remove face panel by pulling panel free from retainers.
2. With face panel removed, clear plastic cover on cluster assembly will be exposed. Remove cover and
cluster by removing two mounting screws.
3. Remove connection to individual instrument to be removed and remove instrument from cluster
assembly.
4. Replace instruments by reversing removal instructions. Check all mountings and connections for
security.
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
34-00-00
Page 34-1
Reissued: July 1, 1993
3E14