Russian 011 OBAT Date change request for IL-10/IL-10M:
Units:
126
127
937
938
Currently some of them last until either 12/1959 or 12/1964.
Apparently in 1956, the Soviets abolished attack "Sturmovik" aviation and retired the IL-10 en masse:
http://www.airwar.ru/enc/aww2/il10m.html
Google Translate reveals:
As of January 1, 1955 Soviet Army Air Force in its composition were 19 assault regiments, armed with 1700 consisted Il-10 and Il-10M and 130 jet fighter-bombers MiG-15bis.
In April 1956, Defense Minister Marshal Georgy Zhukov presented the leadership of the country prepared by the General Staff and the General Headquarters Air Force report on the state and prospects of development of attack aviation. The report concluded the low efficiency of storm troopers on the battlefield in modern warfare, and actually proposed to eliminate the attack aircraft, providing a solution to combat missions for close air support of ground troops in the offensive and defensive forces of bombers and fighter aircraft. As a result of discussion "at the top" order came from the Minister of Defence 20/04/56, according to which a part of the Air Force ground attack aircraft CA abolished available Il-10 and Il-10M written off "by Defense plan," aircrew partially retrained on MiG 15bis, and partly - transferred to fighter aircraft the Air Force and Air Defence. Along with the acceleration of assault by government decree aviation 04/13/56, it was stopped mass production of reactive armored attack aircraft IL-40 and stopped all development work on advanced aircraft-storming.
Suggestion:
Change Out of Service dates on IL-10/10M aircraft to 12/1956. This would represent some 'holdover' from the official order writing them off in April 1956 -- they're still there on the airfields, but no funding is authorized for them, until they're too far gone to bring back hurriedly.