Bucker Bu 131 Ljastovica 
Twelve Bu 131A (some sources say ten Bu 131B) delivered from the manufacturer in 1938. Ljastovica = Swallow. Used by Aeronautical School at Kazanluk for initial flying training. Ten aircraft in service in 1949 with 1st (Initial Training) Escadrila of the People's Air School. Withdrawn from service in 19??. Military type number 7041.

Serial	c/no.	Prev. Identity	Delivered	Fate/Notes
LZ-BUH '26'			1938
LZ-BUI '29'			1938
LZ-B?? '22'			1938
			1938
			1938
			1938
			1938
			1938
			1938
			1938
			1938
			1938

References:

• Air Power of the Kingdom of Bulgaria Part III
• German Aircraft Industry and Production 1933-1945 (Airlife) pp258
• Sojusznicy Luftwaffe I
• Wings of Fame Vol.13

Bucker Bu 181  
Fifteen Bu 181 delivered in 1943 (some sources say 24 aircraft). Used by ? unit for the pilot training role at Kazanluk. Withdrawn from service in 1944. Military type number 7071.

Serial	c/no.	Prev. Identity	Delivered	Fate/Notes
LZ-BEB			1943
LZ-BEK			1943
LZ-BEL			1943	Bulg AF serial 12/7071
			1943
			1943
			1943
			1943
			1943
			1943
			1943
			1943
			1943
			1943
			1943
			1943

References:

• Air Power of the Kingdom of Bulgaria Part IV
• Bulgarian Fighters Part I
• Wings of Fame Vol.13