The point is electronics and hydraulics lines are routed through the fuel tanks to cool the lines, and there are actuators and other components that are in the tanks. . .the result is fuel is hot, and can be very hot, and can be ignited (as a previous Post of mine referenced just a few cases where this happened.).
Good-bye, have a nice evening/night.
Presumably none of which are doing anything when the bird is just sitting there on the ground.
. .the result is fuel is hot, and can be very hot, and can be ignited
That is the alleged result, but it isn't very well supported by the available evidence.
If your theory were correct, all of these aircraft would be potential bombs. Funny thing is, they aren't all blowing up willy nilly.
From the NTSB report:
Examination of the temperature data collected during the emulation flight test indicated that the highest ullage temperature measured within the CWT was 145F and that it occurred in the left mid bay just before the airplane began to taxi for takeoff. Examination of the temperature data also indicated that the highest ullage temperature measured at 13,700 feet msl was 127F and that it occurred in the left mid bay (see figure 33). Table 6 shows the maximum and minimum recorded ullage temperatures at 13,700 feet msl during the emulation flight test.
The Safety Board also measured the ambient air and component surface temperatures within the air conditioning pack bay. At the time that the flight test airplane was pushed back from the gate (after operating on the ground for 2 3/4 hours with the Nos. 1 and 3 air conditioning packs operating), air conditioning pack component surface temperatures ranged from 250 to 350F, and ambient air temperatures within the pack bay ranged from 148 to 228F.
As previously discussed, the CWT is configured within the airframe such that the air conditioning packs are located in an enclosed bay, directly below and very near the bottom surface of the CWT. Because of the high temperatures at which the air conditioning packs operate, the ambient air temperature within the pack bay increases when the air conditioning packs are operated. As a result of these elevated temperatures, heat in the pack bay is transferred into the CWT through its bottom surface. Some of this heat is transferred out of the CWT (for example, into the wing main fuel tanks or the main landing gear wheel well), and some of it remains in the CWT. This heat flow results in a significant increase in the temperature of the CWT fuel and ullage, which was shown in table 6. The temperature variations within the CWT are illustrative of this heat flow. In general, the hotter temperatures in the CWT ullage were located in the lower, center portions of the CWT (nearest the heat source), whereas cooler temperatures were measured around the sides and top of the CWT (where heat was transferred out of the
CWT).