Pavel Kachalka was born in 1919.

He graduated from Chuguyevskoye flight school in 1940.

When Germany invaded the Soviet Union on 22 June 1941, mladshiy leitenant Kachalka served in 9 IAP-ChF of the Air Force of the Black Sea Fleet. This regiment was equipped with I-153s.

In September-October, the regiment was withdrawn from the front and re-equipped with Yak-1s at Yeisk.

Leitenant Kachalka was killed in an air crash on 2 December 1941.

At the time of his death, Kachalka was credited with 1 biplane victory and a total of 4.
These had been claimed during 109 combat missions.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1941
1	10/08/41		1	Do 215	Destroyed	I-153		Air Force of the Black Sea Fleet	9 IAP-ChF
2	17/10/41		1	Ju 88	Destroyed	Yak-1		Air Force of the Black Sea Fleet	9 IAP-ChF
3	17/10/41		1	Ju 88	Destroyed	Yak-1		Air Force of the Black Sea Fleet	9 IAP-ChF
4	27/10/41		1	Bf 109	Destroyed	Yak-1		Air Force of the Black Sea Fleet	9 IAP-ChF

Biplane victories: 1 destroyed.
TOTAL: 4 destroyed.

Sources:
All aces of Stalin 1936-1953 – Mikhail Bykov, 2014
Soviet Aces 1936-1953
Soviet Fighter Pilots 1936-1953 - Mikhail Bykov