Just found this . . . see http://www.planecheck.com/aerostar.htm

"The Aerostar's fuel system has been the subject of some criticism
over the years. The aircraft has three tanks - one in each wing and a
central fuselage tank mounted mid-way up behind the rear cabin
bulkhead. The system holds 165.5 gallons of useable fuel. The
intention was to use tank vents to maintain an equal level of fuel
throughout the system. As the wing tanks depleted however, fuel feed
would come from the fuselage. It is important to always have fuel in
the central tank and although the system is designed to accommodate
this, a number of accidents have followed simultaneous engine failure
caused by uneven feeding.

The number of Aerostar incidents caught the attention of the FAA who
issued an airworthiness directive mandating the use of a low fuel
warning light for the central tank. In 1979, the FAA issued a further
AD forcing owners to install a triple fuel gauge - one for each tank.
The AD also called for fuel cap inspections as it was suspected that
negative pressure was responsible for restricting fuel flow causing
premature depletion of the fuselage tank "

Take care . . .

John