ILS27LEFT,
Thanks for the information.
LEM,
ANSV press release:
http://www.ansv.it/IE/Detail.asp?ID=523
and .pdf file , with [security recommendation] => safety recommendations.
Briefly "the Fuel Quantity Indicators (FQI) of ATR42 and ATR72 are almost identical exteriorly, except for the maximum fuel weight allowable in each wing tank (i.e. "L./R. TK.: 2250 instead of L./R. TK.:2500 kg" in white writing -- two pictures included in the .pdf file), and share the same dimensions and installation procedure. Though, they work differently, using different algorithms, since the configuration and dimensions of the fuel tanks, location and number of sensors are different.
According to several refueling tests, it has been ascertained that when a FQI designed for ATR42 is erroneously installed on ATR72, as it was on the accident aircraft, the instrument yields a non conservative error in the displayed fuel weight, directly proportional to the fuel quantity embarked and, however, never inferior to ~ 900 kg of fuel in each tank (two graphics are alleged in the .pdf file)."
Threemiles,
I share your doubts.
Good continuation,
VB
edited for a language lapsus: "security" => safety. Meglio tardi che mai.