Fuel System

Card Set Information

Author:
chzor86
ID:
97694
Filename:
Fuel System
Updated:
2011-08-20 17:38:33
Tags:
Check
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Description:
Transition
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  1. General Specifications
    • -- 6 Main tanks- aft cabin, aft fuselage, 2 mid, and 2 wing tanks
    • -- Each wing tank is divided into 3 sections; inboard, outboard, center
    • -- Fuel flows from aft cabin => aft fuselage => right mid => left mid => wing tanks
    • -- 12 pumps move fuel around
  2. Boost Pumps
    • (2 electric boost pumps)
    • -- Engine start to provide motive flow to primary jet pump
    • -- X-feed to provide motive flow to primary jet pump
    • -- Source of motive flow to forward transfer jet pump (fuel feed chamber volume below full, fuel feed pressure < 5 ± .5psi)
    • -- Backup for primary jet pump
  3. Transfer Pumps
    • (2 Electric Transfer Pumps)
    • -- Operate continuously when respective generator is on, but fuel is only transferred as required
    • -- Move fuel from Mid tanks to wing tanks
    • -- Shut off automatically when mid tank or line pressure < 5.0 ± .5psi
    • -- 6 motive flow pumps
  4. Motive Flow Pumps
    • (6 motive flow pumps)
    • -- 2 forward transfer jet pumps operate w/ boost pump on to move fuel from wings to fuel feed chamber
    • -- 2 aft transfer jet pumps operate w/ primary jet pump on and/or boost pump on to move fuel from wings to fuel feed chamber
    • -- 2 primary jet pumps operate w/ boost pump on and/or engine driven fuel pump to move fuel from fuel feed chamber to engines
  5. Engine-Driven Fuel Pumps
    • (2 engine-driven pumps)
    • -- Provide motive flow to primary jet pumps
    • --580psi
  6. Ops Limits
    • SL to 41,000ft
    • - 40° - 50°C
    • Total Gallons from pressure 771, from gravity 739
    • Can use Jet –A/A-1/B, JP-4/5/8 must contain icing inhibitor
    • Fuel imbalance
    • -- Take-off/Touch and Go => 100lbs
    • -- In flight/Land => 300lbs
  7. Notes and Caution
    • -- Do not reset popped fuel system CB.
    • -- Fuel quantity indicators at high AOA and/or angles of sideslip are inaccurate
    • -- If fuel quantity indicators fail the needles move to a position below 0.
  8. Annunciators:

    L and R WG TK OV PRESS
    Difference of more than 3.5 ± .5psi between internal and external wing pressure
  9. Annunciators:

    L and R FUEL LEVEL LO
    Usable fuel in wing tank approximately < 200lbs/32gal
  10. Annunciators:

    L and R FUEL PRESS LO
    Fuel feed pressure below 5.0 ± .5psi
  11. Annunciators:

    L and R FUEL FEED
    Usable fuel in fuel feed chamber < 70lbs/11gal
  12. Annunciators:

    L and R FLTR BYPASS
    Pressure differential in fuel filter > 2.3 ±..2; means clogged filter and contaminated fuel
  13. Annunciators:

    L and R XFR PRESS LO
    Low pressure (5.0 ±. .5psi) in transfer line between mid and wing tanks
  14. Miscellaneous Information
    • 3 Surge/Vent drains- 1 fuselage, 2 wing
    • 11 Sump Drains
    • Sniffle valves- allow both air and fuel to be vented (.1-.3psi pulls are in, 5psi lets fuel out)
    • Float check valves- only vent air
    • Pressure relief valves- Overpressure protection during single point refueling
  15. Fire Prevention
    • -- Porous foam in fuselage tank
    • -- Fuel/vapor leaks are routed overboard
    • -- Flame arrestors in fuselage vent lines
    • -- Flame arrestors separate cabin and fuselage tanks
  16. Checks Valves
    • (13 check valves)
    • 1 in each motive flow line (6)
    • 1 Filler port
    • 2 wing tank flow
    • 2 vent line to surge tank
    • 1 in each transfer pump (2)
  17. Flapper Valves
    • (20 flapper valves)
    • --9 in each wing tank
    • --2 fuselage tank
  18. Shutoff Valves
    • (6 shutoff valves)
    • -- 1 each motive flow line from engine driven pump to primary jet pump
    • -- 1 each main fuel supply line to engine
    • -- 1 each X-feed line
  19. Drain Valves
    • Sump
    • De-fuel
    • Filer port drain

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