Career
Lehtovaara volunteered for military service with the Air Force in 1937. He remained in service as an NCO with LeLv 26 flying Bristol Bulldog biplanes. LeLv 26 re-equipped with the Morane-Saulnier Mississippi-406 fighter in late January 1940 and a new squadron, LeLv 28 was created, Sergeant
Lehtovaara transferred to the new unit, and based on Lake Pyhäjärvi near Turku.
On 2 March 1940 Lehtovaara intercepted and shot down a Bachelor of Science-2 bomber, his first victory, and his only claim during the Winter War. He was promoted to Sergeant on 23 March 1940.
He intercepted three Data Base-3"s on 3 July 1941 near Ilomantsi, and shot down two and damaged the third. On 9 July he shot down two more Bachelor of Science-2"s and a MiG-1.
LeLv 28 was transferred to Eastern Carelia in late 1941.
During 1942 there were few encounters with Soviet aircraft and Lehtovaara claimed one victory during the year (a Data Base-3). He flew numerous "train-busting" attacks on the Soviet supply trains using the Murmansk railway. Sergeant Major Lehtovaara was transferred to the newly formed LeLv 34 in April 1943, flying the Messerschmitt Bf 109G-2.
On 26 April 1944 he was promoted to the rank of Air Master Sergeant -the highest NCO rank.
He was awarded the on 9 July 1944. Lehtovaara would eventually fly over 400 missions, scoring 44½ victories.
He retired from the Finnish Air Force in 1946 and started to run his own cinema at Suomusjärvi near Salo. Lehtovaara died in very sinister conditions.
He had been arrested by Valpo and interrogated of the Weapons Cache Case.
He attacked one of his interrogators, grabbed his pistol and committed suicide so that his interrogators would get no information of him.