Fuel Quantity Indicator, TBM Avenger, 4 Tank, Liquidometer EA-140-4 C-7 The system consists of a

The system consists of a motor-driven speed sensor and a display instrument

They could be opened inward to allow a pilot to de-ice his main windscreen or

It included a toggle in the center to test that the bulbs were good

as the case has a label as a torque indicator

and many others

Fuel Quantity Indicator, TBM Avenger, 4 Tank, Liquidometer EA-140-4 C-7 The system consists of aHere is an exceptional artifact from the iconic WWII era US Navy Torpedo Bomber, the TBM Avenger: a 4 tank Fuel Quantity Indicator. Made by Liquidometer, part number EA 140 4, FSSC number 88 I 2121, the unit indicated fuel quantity in four tanks: left, right, and center wing tanks, and the bomb bay droppable tank. The part numbers have been confirmed in the TBM Avenger Erection and Maintenance Manual dated August 1945. See photo from the TBM Avenger