Blueheron/Heldeberg Designs Ll Marathon registrations
2 Blueheron/Heldeberg Designs Ll Marathon aircraft on the FAA register (FAA model MARATHON), newest first.
| N-number | Year | Aircraft |
|---|---|---|
| N5132Z | 2006 | Blueheron/Heldeberg Designs Ll Marathon |
| N67890 | — | Blueheron/Heldeberg Designs Ll Marathon |
Source: FAA Aircraft Registry, October 2026. Each N-number links to its aircraft page with registration record, history and accident data.
