KV ERJ Fuel Panel (12) Flashcards
What is the total fuel capacity on the ERJ?
20,935 lbs. 3,094 US Gallons. (AFM 2-36.1)(SOPM 2-4.3)
Is the usable fuel quantity any different if the aircraft is gravity refueled?
No. The wing fuel tanks may be partially or completely refueled using the gravity fuel port located on top of each wing. (AOM 14-10-10.11)
Can the aircraft be refueled without AC power?
Yes. Pressurized refueling is performed with the airplane energized either by AC or DC battery power. (AOM V2 14-10-10.11)
The wing fuel tanks may be partially or completely refueled using the gravity fuel port located on top of each wing. (AOM 14-10-10.11)
What is the purpose of the DC fuel pump?
One DC fuel pump is installed only in the right wing tank. It provides pressurized fuel for normal APU operation and engine start, when AC power or the AC fuel pump is not available. (AOM V2 14-10-10.5)
What is the maximum fuel imbalance? When does the EICAS message appear for an imbalance?
1) 794 lbs. Max fuel imbalance (SOPM 2-4.3) 2) @ 800 lbs -
2. a) EICAS CAUTION message
(AOM V2 14-10-10.8)
What happens when you move the cross feed switch to the “LOW 1(2)” position?
LOW 1: Crossfeed valve opens, and AC PUMP 2 activates feeding both engines from wing tank 2.
LOW 2: Crossfeed valve opens, and AC PUMP 1 activates feeding both engines from wing tank 1. (AOM V2 14-10-10.6)
During single engine operations, how would the pilot correct a fuel imbalance situation?
The same as two engine operations, by selecting LOW 1 or LOW 2 with the crossfeed selector knob. (AOM V2 14-10-10.6)
When should you declare minimum fuel? Emergency fuel?
1) 2250 lbs / :45 min - Declare minimum fuel
2) 1500 lbs / :30 min - Declare emergency fuel (SOPM 5-1.2, 5-1.3)
When will the FUEL IMBALANCE EICAS message extinguish?
< 100 lbs…The EICAS CAUTION FUEL IMBALANCE will extinguish (AOM V2 14-10-15.1)
If the engines burn fuel evenly, what is the most likely way of getting into a fuel imbalance condition?
1) Running the APU
2) Single engine taxi
3) or leaving crossed switch low 1(2) too long.
Why do we use the term cross feed and not crossflow?
Crossfeed permits fuel supply to both engines from one tank to correct and avoid a fuel imbalance condition. Crossflow permits fuel to flow between fuel tanks. ERJ aircraft do not posses crossflow capability.
Is it possible to get the FUEL 1(2) LO LEVEL warning message and not be in a low fuel condition?
Yes. Each wing tank has a dedicated Fuel Low Level sensor located in the wing collector box that is independent of the fuel quantity indication system.
1) Collector box sensor below 600 lbs. triggers the FUEL LO LEVEL WARNING EICAS message.
This message can occur spuriously when flying with high pitch and/or bank angles.
2) If any scavenge pumps stop transferring fuel to the collector box (engine failure, loss of motive flow or scavenge pump failure / blockage), the fuel contained in the collector box flows out so that the fuel inside the collector box and the rest of the tank reaches the same level. If there is up to ~3970 lbs of fuel in that tank it is possible that the level equivalent to the low level warning activation point will be reached triggering the EICAS warning. Monitor fuel quantity through EICAS or MFD Fuel Synoptic page.
3) Engine flameout due to fuel starvation may occur if the airplane is subject to attitudes greater than 15° nose up or down, uncoordinated maneuvers or negative G’s. (AOM V2 14-10-10.10)
Minimum Fuel
Min Fuel ……………………2,250 lbs
Emergency Fuel………..1,500 lbs
