Piper Navajo Chieftain PA-31-350 Service Manual page 23

NAVAJO CHIEFTAIN SERVICE MANUAL
SECTION II
HANDLING AND SERVICING
2-1. INTRODUCTION. This section contains routine handling and servicing procedures that are most
frequently encountered. Frequent reference to this section will aid the individual by providing information
such as the location of various components, ground handling procedures, routine service procedures and
lubrication. When any system or component requires service other than the routine procedures as outlined
in this section, refer to the appropriate section for that component.
2-2. DIMENSIONS. The principal airplane dimensions are shown in Figure 2-1 and are listed in Table II-I.
2-3. SERIAL NUMBER PLATES. The serial number plate for the airplane is located near the tail skid. The
MAA plate is located under the lower front corner of the entrance door. The engine number plates are
located on the right side of the oil sump.
2-4. WEIGHT AND BALANCE DATA. When figuring various weight and balance computations the weight
and empty weight center of gravity of the airplane may be found in the Weight and Balance section of the
Airplane Flight Manual.
2-5. STATION REFERENCE LINES. In order to facilitate the location of various components of the
airplane which require maintenance and servicing, a method utilizing fuselage station, wing station or
buttock line (BL), and water line (WL) designations is frequently employed in this manual. (Refer to Figure
2-2.) Fuselage stations, buttock lines, and water lines are reference points measured by inches in the vertical
or horizontal direction from a given reference line which indicates station locations of structural members
of the airplane. Station 0 of the fuselage is 18 inches aft of the nose. Station 0 (BL) of the wing, horizontal
stabilizer and elevator is the center line of the airplane; and station 0 (WL) of the vertical stabilizer and
rudder is 15.82 inches above the cabin floor with the airplane level. The reference datum line is located at
the main spar, fuselage station 137.
2-6. ACCESS AND INSPECTION PROVISIONS. The access and inspection provisions for the airplane
are shown in Figure 2-4. The components to be serviced or inspected through each opening is assigned an index
number to identify it in the illustration. All access plates and panels are secured by either metal fasteners or
screws.
The floor panels may be removed by first removing the desired seats, then removing the carpet, thus
exposing the floor panel attachment screws. Carefully remove the floor panels so as not to damage them.
To enter the aft section of the fuselage, remove the rear baggage compartment upholstery panel by
removing the attachment screws.
CAUTION
Before entering the aft section of the fuselage, be sure the airplane
is supported at the tail skid.
2-7. TOOLS AND TEST EQUIPMENT. Because of the simplicity and easy accessibility of components,
few special tools outside normal shop tools will be required. Tools that are required may be fabricated from
dimensions given in the back of the section that pertains to a particular component or are listed in the back
of the PA-31-350 Parts Catalog, Part No. 761 487.
Reissued: 9/23/80
HANDLING AND SERVICING
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