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Wheel and Flap Position Indicator, AN5780-3, 8DJ26AAA

General Electric

Wheel and Flap Position Indicator, AN5780-3, 8DJ26AAA


This is a late WWII-era Wheel and Flap Position Indicator, Type AN5780-3, as used in  aircraft of the US Army Air Force with either tricycle landing gear (i.e., nose wheel) or tail wheel configurations. According to the Maintenance Interchangeability Chart dated Feb 1945, late models of medium bomber B-26 Marauder, attack bomber A-20 Havoc, and night fighter P-61 Black Widow used this indicator.  This particular indicator has a serial number prefix of AF44, evidence of a year of manufacture of 1944.

When the individual wheels are down, the rotating display for each wheel shows an extended image of a wheel.  When the wheels are retracted, the display rotates to display "UP".  In between when the landing gear is unlocked, the diagonal lines are displayed. As the flaps are deployed, the upper center indicator displays a flap symbol along the scale showing the amount of flap deployed, i.e., full Up, 1/4, 1/2, 3/4, full Down. This design went on to become standard in many post war aircraft both in the US Air Force and US Navy.

This indicator is in exceptional condition for its age. The glass and case are intact, and the markings on the face are precise and unblemished.  Measures 3.25 inches diameter and ~3 inches deep.

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