Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 607 / 1956

PAGE 1
Feb 28/07 3F15
28-00-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
GENERAL
WARNING: DURING ANY FUEL SYSTEM MAINTENANCE, USE A GROUND WIRE ATTACHED
FROM EACH MAIN GEAR GROUNDING PIN TO SEPARATE APPROVED GROUNDING
STAKES TO PREVENT THE ACCIDENTAL DISCONNECTION OF AIRPLANE
GROUNDING.
Fuel System
A. Description
The fuel system consists of an integral fuel tank in each outboard wing section, having a usable
capacity of 60 U.S. gallons for a total usable capacity of 120 U.S. gallons. The fuel tanks are part of
the wing structure - i. e. - a wet-wing configuration. Each tank has an anti-icing fuel vent and forward
and aft fuel supply lines with finger screens. Fuel flows from these finger screens thru lines to a one
(1) U.S. gallon collector tank located in each wing wheel well area. Installed in each collector tank is
an electrically driven centrifugal fuel boost pump which is activated in conjunction with the fuel
selector control in the cockpit. A sump drain is also located in each collector tank.
Fuel leaving the left or right collector/sump tank flows to a selector valve which is located on the
right fuselage side behind the copilot’s seat in a non-pressurized compartment. All fuel lines
passing through the pressurized cabin are metal tubes surrounded by plastic cushion and encased
by a second metal tube. This second tube is sealed from the cabin environment to preclude fuel
from entering the cabin area or pressurized cabin air from entering fuel lines in the event of a leak.
The selector valve is cable controlled by a thumb-sized handle (just below the fuel quantity gauges)
with detents at the OFF, LEFT, and RIGHT positions. Selecting LEFT or RIGHT directs fuel flow to
the engine from the tank selected. To select OFF the fuel selector must be moved to the left tank
position, moved down against spring pressure, then moved to the far left, or OFF position.
Fuel flows from the fuel selector valve forward to the fuel filter located below the baggage floor on
the right side. The filter drain is a nylon tube located on the right side of the aircraft, forward of the
wing. Fuel flows from the filter, forward through the emergency fuel pump and fire wall, into the
engine compartment, to the engine driven fuel pump.
B. Troubleshooting
Chart 1 lists troubles which may occur in the mechanical or electrical portions of the fuel system,
the probable cause and suggested remedy. When troubleshooting, first check from the fuel supply
or power source to the item effected.