Press-to-Test / Dimmable Indicator Lights

These MS25041-series mil-spec indicators replace the original amber and green gear position indicators; the white in-transit light on the later airframes is an available option. Both the panel mounting ½” hole and the bulbs remain the same as the original. Expect an experienced installer to do the installation in 1 to 1-1/2 hours; an adjacent instrument hole is required for access.

Operation of the test function is activated by depressing the lens; dimming by twisting the lens clockwise. Only the amber has this dimming function; the green lighting is not so intense as to require that. This non-dimming function also helps to avoid an inadvertent daytime problem after a night flight.

Added wiring consists of a circuit to the existing 5-amp indicator lights’ circuit breaker for the bulb-test function, and a ground circuit. Kit contents include the indicators properly assembled with MS22759/16-20 Tefzel wire marked per the airframe specification using the Kingsley hot-stamp process. Marked wire for the added circuits, terminals, bulbs, PVC sleeve to cover the knife terminals, nylon cable ties for security, instructions and schematic are also included.

Benefits

  1. Safety – adds bulb testing capability.
  2. Dimming – is independent of the electrical circuit.
  3. Safety – eliminates the hard-to-see green light during night operations.
Landing gear indicator lights