The Gulfstream G-280 Fuel Quantity test box speeds diagnosing failed Capacitance Probes, and wire harness failures.
Each of the LOW-Z selection test switches connects the Barfield LOW-Z to the specific probe.
The switch is labeled with the AMM Nomenclature for that probe; including the IPC part number
P/N: 765931-1-0.
The allowable Capacitance range is labeled (45.20 to 50.00).
The final label is associated with HI-Z (HI-Z RH OUTER)
The arrow points to the position of installation in the wing; including the closest fuel panel access door (10Q is closest to RH DOOR #6)
The test box cables access the FQMC, located in the aft RH avionics closet.
This allows evaluation of the entire 400HZ capacitance wiring, from the probes, to the wing disconnects, right through the fuselage harness.
Equipment produced by Aviation Technical Solutions, LP.
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