Piper Malibu PA-46-310P Pilot Operating Handbook page 266

PIPER AIRCRAFT CORPORATION
PA-46-310P, MALIBU
SECTION 7
DESCR/OPERA TION
Fuel quantity is indicated by gauges located above the fuel selector
handle. Each tank has two sensor sending units. Gauges are electrical and
will operate when the battery switch is ON. Fuel tanks can be vist1ally
confirmed full if fuel level is up to the filler neck.
NOTE
Removal of the fuel filler cap from a wing tank
that is sitting low or from an overfilled tank
caused by thermal expansion could result in
fuel spillage.
Quantity gauges should be monitored at regular intervals during flight.
Fuel tank selection should be alternated accordingly to maintain wing
balance.
NOTE
Aircraft should be refueled in a wings level
condition. At times. this will require alternate
filling of left and right tanks until the full
condition is reached.
Each collector/sump tank has a submerged. electric. centrifugal fuel
pump having 2 speed selections available through a switch on the instrument
panel. LOW speed is intended for vapor suppression at altitude and may be
used during normal engine operation both on the ground and in flight.
Unstable engine operation or fluctuating fuel flow indications are signs of
vapor in the fuel lines.
The HIGH pump speed selection on the instrument panel should be
used only in the event of engine failure if an engine-driven pump failure is
suspected. Adequate pressure and fuel flow will be supplied for up to
approximately 75% power.
NOTE
Excessive fuel pressure and very rich fuel/ air
mixtures will occur if the HIGH position is
energized when the injection system is
functioning normally.
The fuel pump will run at high speed automatically when the engine
primer is being used. Selection of left or right auxiliary fuel pump is deter-
mined at the fuel selector by moving the selector handle to the left or right
tank. Neither pump will operate if OFF or a position between detents is
selected on the fuel selector.
ISSUED: JANUARY 11, 1984
REVISED: JANUARY 15, 1986''
REPORT:
;'B-1100
7-17