He was also the first person to complete a successful powered aircraft crossing of the Alps in 1913, following a 1910 attempt by his friend Jorge Chávez that ended in a fatal crash landing.

[1] The couple had moved to Peru after Bielovucic's father, originally from Mokošica in Rijeka Dubrovačka area, retired from his position as a merchant navy captain.

He took part in Le Bourget Air Show and completed the 295-kilometre (183 mi) Paris–Nancy flight in 1911, setting a new record of two hours and fifty minutes for the route.

[2] On 15 January 1911, Bielovucic returned to Peru, bringing with him an airplane and the technical staff requested by the Peruvian Aviation League.

Chávez had almost completed his flight, but lost control of his final descent, crashed from an altitude of 10 metres (33 feet), and sustained fatal injuries.

He made a second attempt to cross on 25 January,[2] taking off from Brig-Glis, Switzerland at noon, and successfully landed in Domodossola in Italy at 12:25.

[2] Bielovucic was awarded the Legion of Honour,[7] as well as the Croix de guerre with a bronze palm and a number of Belgian and Peruvian medals.

Bielovucic retired from active piloting in 1920,[2] and returned to Peru where he became lieutenant commander of the PAC Reserve, regarded as a national hero.

[8] During World War II, while posted in Paris as Peruvian air attaché,[9] Bielovucic actively cooperated with the French Resistance.

[8] In late September 1910 Bielovucic took Filippo Tommaso Marinetti, founder of the Futurist movement, over Milan as a passenger in a Voisin biplane during the International Air Week.