Fuel System Flashcards
Burn rate
~200lbs per hour
Header Tank Lvl
Normal: 204
Caution: 194
Warning 179
Landing Fuel
Normal Recovery: 400
Minimum: 350
Emergency: 300
Fuel Heater Auto Shutoff
26v
this would be seen during a dual gen failure, the system will auto shed the system when voltage reaches 26
Header Tank Pressure
Caution: 4.2psi
Warning: 4.6
Fuel Feed Pressure
Min: 16
Normal: 18-55
Max: 60
Fed from the boost pumps into the header
Tank Fuel Temperatures
Min: -30
Normal: -21-49
Max: 55
Engine Fuel Pressure
Min: 20psi
Normal: 25-90
Max: 95
fed from the engine pump into the engine
VIT 50 (fuel system data 2)
Failed solenoid closed or open data
only capable of showing what has been commanded by the AC not necessarily what is actually occuring
VIT 1 Engine & Electronics Data
Fuel flow burn rate
Fuel burned
Fuel calculation
Fuel engine, hdr tnk, JPMan pressure
VIT48 Fuel System Data 1
Comprehensive overview:
Fuel tank calculations
Fuel temperatures
Fuel pressures
Burn rate
Fuel burned
Total fuel
JP Manifold Pressure
Min: 16psi
Normal: 18-55psi
Max: 60
If under 15psi in auto, RCM resets active fuel pump 2times, if doesn’t work, both pumps are commanded on
Fuel Header Tank Pressure level or Low Pressure Checklist
Cycles through tanks to identify & lock out malfunctioning tank/solenoid
PSI Doesn’t recover? Possible
PSI recovers? Practical
VIT48
Fuel Pump Failure Checklist
Indications: pump 1 or 2 failed
Auto mode activated both pumps
PSI >30 jettison one tank at a time
PSI <30 man tank select
Possible
Fuel Solenoid Failed Open or Closed
Indications: fuel increase in nonselected tank, (Return sol.fail Open) and low hdr tnk lvl (feed solenoid fail. Closed)
<4.6PSI
Cycle through tanks
Lockout
Possible
