Fuel Hydraulic Indicator Panel
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The Fuel and Hydraulic Indicator Panel provides real-time readouts for the aircraft’s fuel distribution and hydraulic system pressures.
It allows the pilot to monitor fuel levels in all tanks (internal and external) and the status of hydraulic systems A and B, both critical for flight control and gear operation.
This panel includes a rotary selector to display different tank readings and a test function for system verification.
Instrument and Control Descriptions
Function: Displays the hydraulic pressure for the left and right systems.
Scale: 0 – 3,500 PSI.
Type: Analog dual gauge (two independent needles).
Green zone: Normal operating range (~3,000 PSI).
Yellow/red: Low pressure warning zones.
Type of Control: None (indicator only).
Function: Indicates total and per-tank fuel load (Left, Right, and Center).
Upper counter: Total fuel (in thousands of pounds).
Dial pointers: Left, Right, and Center tank levels.
Scale: 0 – 7,000 lbs per tank.
Type: Multi-needle analog gauge (servo/stepper-driven).
Function: Selects which fuel tanks are displayed on the fuel indicator.
INT: Internal tanks only.
MAIN: Main tanks (fuselage).
WING: Wing tanks.
EXT WING: External wing tanks.
EXT CTR: External center tank.
Type: 5-position rotary switch.
Function: Initiates a self-test for the fuel and hydraulic indication systems.
Action: When pressed, it simulates nominal readings for instrument verification.
Type: Momentary push button (normally open).