| Registration Letters | OY-BTL |
| Manufacturers's serial number | 28-7790591 |
| Year Built | 1977 |
| Registration Date | 1977.09.27 |
| Previous Identities | |
| Cancelled | 1989.12.20 |
| Fate | OE-KOS G-FKOS |
| Notes | 2007.03.27: G-FKOS. |
| Type Designation | Piper PA-28-181 Cherokee Archer II |
| Manufacturer | Piper Aircraft Corporation |
| CoA | 1674 |
| Issued | 1977.09.27 |
| Builder | Piper Aircraft Corporation |
| Place | Vero Beach, FL, USA |
| COR | 07432 |
| Issued | 1988.01.29 |
| Cancelled | 1989.12.20 |
| Owner | Jan Kjærulff Yacht Design |
| Town | Rungsted Kyst |
| User |
| COR | 05461 |
| Issued | 1980.07.04 |
| Cancelled | 1988.01.29 |
| Owner | Ikaros Fly IV K/S |
| Town | Frederikssund |
| User |
| COR | 05241 |
| Issued | 1979.10.12 |
| Cancelled | 1980.07.04 |
| Owner | Danfoss Aviation Division A/S |
| Town | Nordborg |
| User |
| COR | 05086 |
| Issued | 1979.05.08 |
| Cancelled | 1979.10.12 |
| Owner | Ikaros Fly I K/S |
| Town | Frederikssund |
| User |
| COR | 04728 |
| Issued | 1978.04.07 |
| Cancelled | 1979.05.08 |
| Owner | Henning Gertz (+3) |
| Town | Glostrup |
| User |
| COR | 04558 |
| Issued | 1977.09.27 |
| Cancelled | 1978.04.07 |
| Owner | Danfoss Aviation Division A/S |
| Town | Nordborg |
| User |
| COR | 04525M |
| Issued | 1977.08.08 |
| Cancelled | 1977.09.27 |
| Owner | Danfoss Aviation Division A/S |
| Town | Nordborg |
| User |
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