Post by LOU on Oct 15th, 2011 at 3:20pm
The GPWS is a 3 position switch.
With the guard in the up position you can select OFF or OVERRIDE.
With the guard in the closed or down position the switch is forced to the NORMAL position.
Boost pumps Low Pressure warning lights on fuel panel lights-up when about 3000 lbs left in a tank. I think thats bad idea to arrive with that low fuel.
The low pressure lights should not be on with 3,000 pounds of fuel in the tank.
In this example I show the right tank with only 600 pounds and the low pressure lights are not on. No, if I was flying around with just 600 pounds of fuel in the tanks you might see low pressure lights flash on and off if you were at high or low pitch attitudes or bank angles.
Fuel for flight - FAA
1. IFR - Fuel to the destination + 45 minutes.
2. IFR with an alternate - Fuel to destination + fuel to most distant alternate + 45 minutes.
You can put extra fuel for taxi out and holding and diverting around thunderstorms, but you cannot plan to land overweight. So, the taxi fuel must not be part of the flight fuel for planning. If you don't burn all the taxi fuel it could put you in a position where you are too heavy for takeoff.
This was a problem we had all the time at KJFK which had long taxi times in the summer with high traffic and afternoon thunder storms. We would take double and triple taxi fuel so as not to have to return to the gate for more fuel. On a long flight with an alternate you would always be taking off at max takeoff weight. You had to be real careful not to take too much taxi fuel, but enough so as not to have to return to the gate. There were all sorts of fancy planning tricks to allow you to carry enough fuel to make the trip and not be illegal.
I tried to always have at least one hour of fuel on board at landing, but sometimes that was very hard. I remember a 747 of People Express landing KEWR after diverting from KJFK because of low weather. Some of the engines flamed out on taxi in. Now that was really close! :o
Lou
Lou
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With the guard in the up position you can select OFF or OVERRIDE.
With the guard in the closed or down position the switch is forced to the NORMAL position.
Boost pumps Low Pressure warning lights on fuel panel lights-up when about 3000 lbs left in a tank. I think thats bad idea to arrive with that low fuel.
The low pressure lights should not be on with 3,000 pounds of fuel in the tank.
In this example I show the right tank with only 600 pounds and the low pressure lights are not on. No, if I was flying around with just 600 pounds of fuel in the tanks you might see low pressure lights flash on and off if you were at high or low pitch attitudes or bank angles.
Fuel for flight - FAA
1. IFR - Fuel to the destination + 45 minutes.
2. IFR with an alternate - Fuel to destination + fuel to most distant alternate + 45 minutes.
You can put extra fuel for taxi out and holding and diverting around thunderstorms, but you cannot plan to land overweight. So, the taxi fuel must not be part of the flight fuel for planning. If you don't burn all the taxi fuel it could put you in a position where you are too heavy for takeoff.
This was a problem we had all the time at KJFK which had long taxi times in the summer with high traffic and afternoon thunder storms. We would take double and triple taxi fuel so as not to have to return to the gate for more fuel. On a long flight with an alternate you would always be taking off at max takeoff weight. You had to be real careful not to take too much taxi fuel, but enough so as not to have to return to the gate. There were all sorts of fancy planning tricks to allow you to carry enough fuel to make the trip and not be illegal.
I tried to always have at least one hour of fuel on board at landing, but sometimes that was very hard. I remember a 747 of People Express landing KEWR after diverting from KJFK because of low weather. Some of the engines flamed out on taxi in. Now that was really close! :o
Lou
Lou
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