09/27/2004. Remarks by Alfred Damen: "This aircraft with a Philippine registration is the ex-Spain Do 24 T-3 c/n 5345 used by Dornier to try to interest the operators of the Do 24 in the eighties in upgrading their machines. This consisted of replacing the receiproking engines by turbo-props and modify the wing.

The program was called TT (Technologie Träger = Technology Testbed). The sole test aircraft flew for the first time April 25, 1983 registered as D-CATD.
After the test program it was donated to the Deutsche Museum and from there taken by the grandson of Dornier to the Philipines and overhauled. Stationed at Biggen Hill, UK, it was intended to make a world tour with his aircraft."