Fuel System Flashcards
Fuel Capacity
W/O Opt Tanks: 98 gals
W Opt Tanks: 128 gals
Usable Fuel
W/O Opt Tanks: 93 gals
W Opt Tanks: 123 gals
How many fuel tanks are in each wing?
2-3: Two w/o opt, 3 with opt
The engine draws fuel from which wing tank?
The Inner tank, the outer will automatically refill the inner
What type of fuel injection system does the Seneca have?
Continuous Flow:
Includes a vapor return line for unused fuel collected in the injector pump.
How many fuel pumps are there on the PA-34?
5
2 engine driven
2 electrically driven aux pumps
1 Heater fuel pump
What are the settings for the Aux fuel pumps?
Off
HI
Low
When will the Aux fuel pump indicator light turn on?
When the HI setting is selected
If the Aux fuel pump indicator light dims what is happening?
Fuel pressure is automatically reducing or the MAP setting is less than 21”
The HI pressure setting on the Aux pump can supply adequate fuel flow and pressure up to what power setting in the event of an engine driven pump failure?
Approx 75%
What can the Low aux pump setting be used for during normal engine operation?
Fuel flow and pressure stabilization when at idle or operating at high altitudes
What are the three fuel selector settings?
Off
On
X-Feed
Your right engine has failed. What will your fuel selector setting be to balance the tanks?
Right: Off
Left: X-Feed
If X-Feed is selected for the right engine what tank will fuel be drawn from and what tank will excess fuel be returned to?
Drawn from the left inner tank, returned to the right inner tank.
From the notes: “Fuel and vapor are always returned to the tank on the same side as the operating engine”.
How many fuel sumps are on the PA-34?
8 Total
2 Fuel filter sumps
4 Tank sumps
2 X-Feed line sumps
