Piper Navajo Chieftain PA-31-350 Service Manual page 18

NAVAJO CHIEFTAIN SERVICE MANUAL
1-10. ENGINES AND PROPELLERS. The airplane is powered by two Avco-Lycoming six cylinder, direct
drive, wet sump, horizontally opposed, fuel injected, turbocharged engines. The left engine rotation is in
the right hand direction, while the right engine rotates in the left hand direction. The propellers are Hartzell
full feathering, constant speed three bladed units controlled by a governor mounted on each engine.
1-11. FUEL SYSTEM. The fuel system consists of four bladder-type cells located in the wings with a total
fuel capacity of 192 U.S. gallons. Incorporated in the system are NACA type anti-icing, non-siphoning
vents, fuel filters, electric auxiliary fuel pumps, boost pumps, engine driven pumps and a crossfeed system.
1-12. INSTRUMENTS. Provisions for the instrument installation includes panels for engine instruments
and advance flight instruments, as well as space for an optional second set of flight instruments for the
copilot. The panel is shock-mounted to minimize vibration to the instruments.
1-13. ELECTRONIC EQUIPMENT. Provision for electronic equipment includes various combinations of
radio installations, AutoPilot and radar.
1-14. HEATING AND VENTILATING SYSTEM. Heated air for the cabin and defroster is obtained from
a 50,000 B.T.U. Janitrol Heater installed in the nose section. Fresh air for the cabin interior is obtained
from two individual sources; one from an intake in the nose section and the other from an intake located
outside on the forward bottom of the fuselage.
Revised: 10/15/82
INTRODUCTION
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