Ops Limits/#s
Ops Limits 2/#s
General GK
Jet Pumps
Lights/Indications
100
4.8
Wings and Tips of Course
100
200
200 pounds maximum wing/tip imbalance with autopilot engaged
100
The ______ operates in parallel with the ______ valve during this method of fuel transfer.
Fuselage valve; crossflow valve
100
How do Jet pumps work?
How many are there?
Utilize motive-flow
Venturi action results in low-pressure, high volume output
One in each tip tank and each wing root
100
When will the standby pumps not operate in the "on" position?
Fuel Transfer operations
200
162
162 pounds unusable fuselage fuel if gravity fed forward
200
925
925 pounds tip maximum for Landing (structural)
200
Transfer pump will also be deenergized if _____ PSI pressure switch in right wing tank is attained before fuselage tank is empty
5 PSI pressure switch
200
When does the Jet pump take over during the start sequence?
200
When will the Low Fuel Light come on?
(1) Fuel quantity in either wing tank is about 400 to 500 lbs
(2) Operated by float switch in each tank
(a) When nose up (On at lesser quantities)
(b) When nose down (On at greater quantities)
300
760
760 pounds tip maximum to transfer fuselage fuel forward
300
105-260
Add 20 oz. can Hi-Flo Prist or Quell Anti Ice Additive per 105-260 gallons fuel
300
Why would we turn off the jet pumps when the fuel computers are operating in the MANUAL mode?
To prevent pneumatic circuit icing...
300
After engine start, if either or both switches are noted to be Off, reset to ON during steady engine operation at _____ or above N1.
• For normal operations, the jet pump switchesshould be in the ON position. However, if either or both switches are noted to be Off, resetto ON during steady engine operation at _____ N1 or above.
80% N1
Here's Why:
(This procedure is required to prevent the initial drop in fuel pressure as the motive flow valve refills the jet pump lines. At low power settings the engine driven fuel pump does not put out enough pressure for initial motive flow operations and engine operations. Since the motive flow is tapped off before the engine, engine fuel starvation is likely. Above 80% N1 the engine driven fuel pump puts out excessive pressure and can support initial motive flow and the engine fuel demands )
300
When will the Fuel Filter light come on?
(1) either or both low pressure filter is clogging
(2) By-pass valve is open (this is in tailcone, not on the engine)
400
1175
R Tip – 1175 lbs (Recognition light in tip)
400
1.25
1.25 PSI (Fuel Filter) light – Get bypass at 2.25 PSI
400
Until what altitude should fuel be supplied without Jet pumps or standby pumps?
25,000 Feet, via suction feed
400
Why do we have Jet Pumps in the Tip Tanks?
It is required to transfer lower 1/2 of tip tank to the Wings
NOTE: Upper 1/2 can gravity feed to wing through check valves
400
What PSI do we get the L Fuel Press or R Fuel Press light?
.25 PSI
(Turn on the stand-by pump)
500
600
600 pounds will gravity feed from each tip wing
600 pounds will dump on ramp from each tip if the Jettison switch is on during preflight checklist
600 pounds maximum demo tip fuel imbalance
600 pounds minimum each wing fuel for takeoff or intentional Go around – Limited to 9° pitch maximum
500
15,000, 500, 100, -54C,
Av Gas (In any proportion) = 500 Gal. Max per 100 hours of operation per engine:
– -54° C (-65°F)
– Below 15,000 MSL
– Both jet & standby pumps on
500
How long does it take to dump the tip tanks when full?
5 Minutes
500
What PSI output do the Jet pumps provide?
Standby Pumps?
Approximately 10-12 psi output
Approximately 16-18 psi output
500
How many Lights are on the Fuel Panel?
How many Amber Lights?
Which Amber Lights ARE NOT disagreement lights?
11
7
Fuel Jettison