Software that ships with the airframe: the DIS210 cabin display.

Building for an LRU inverts most assumptions of modern app development.

Not every interface lives on a passenger's phone. For Textron Aviation, with Heads Up Technologies, we built the application for the DIS210, a built-in cabin display installed in the aircraft as a line-replaceable unit (LRU). This is software that ships with the airframe: it boots when the aircraft powers up, runs for the life of the installation, and gets no app-store updates to fall back on.

The hardware is fixed and resource-constrained; you don't get to assume next year's chipset. There is no “refresh the page”: the display must come up ready, every power cycle, and stay responsive for the full duration of every flight. On embedded aviation hardware, “it usually works” isn't a spec, it's a defect.

A display that is on when the aircraft is on.

A 4:1 panel in the cabin wall. Eight functions on a fixed grid, a quick-access row beneath them, and a welcome screen that greets passengers as the aircraft powers up. There is no gesture to learn and no state the unit has not been designed to be in.

• Fixed function gridEight tiles and a quick-access row, identical on every unit in the fleet. Crews are trained once, so the layout never moves.

Screens from the shipping application

An interface engineered for the constraints of embedded aviation hardware.

• The full DIS210 application

  The complete application for the built-in display unit, designed from the start around the constraints of embedded aviation hardware.

• Preferences that live on the unit

  Wallpaper sets and settings are loaded onto the LRU and switched for the forward and aft displays independently. They survive every power cycle without a server to restore them from.

• Predictable performance

  Controlled memory footprint, deterministic rendering, and fast boot-to-ready behavior on fixed, resource-constrained hardware.

• Built for the LRU lifecycle

  Long service life, field replaceability, and behavior that stays consistent unit-to-unit across the fleet.

• Aviation-grade discipline

  Exhaustive failure-mode analysis, defensive handling of every input and state, and testing built around how the hardware actually behaves, not how an emulator does.

A display that is simply part of the aircraft.

Software that passengers and crew never have to think about: it is on when the aircraft is on, it responds when touched, and it behaves identically on every airframe in the fleet.

A phone app can ask the user to try again. A display bolted into the aircraft cannot. Every state the unit can reach is a state we designed for.