Hi,
Found some info about former Yugoslav Ka-25 helicopters;
4912515 Ка-25ПЛ 11301 ВВС Югославии, toc 22nov74
opb 784. pphe/97. ab at Divulje; dbr during the night on 28apr92 while landing at Ortije? without on-board and ground lighting when the pilot was glared by a spotlight and landed the helicopter so hard that it rolled over onto its side, both crew slightly injured; t/t 1,327.59 hours ?
4912516 Ка-25ПЛ 11302 ВВС Югославии, toc 22nov74
opb 784. pphe/97. ab at Divulje; sent to 770 ARZ at Kacha for rework in the late 1980s and never returned
4912517 Ка-25ПЛ 11305 ВВС Югославии, toc 22nov74
opb 784. pphe at Divulje (later Golubovci); wfu 14aug94 as useful life-time expired, stored at Golubovci; destroyed on the ground at Golubovci by a NATO air raid during Operation "Allied Force" may99
4912518 Ка-25ПЛ 11306 ВВС Югославии, toc 22nov74
opb 784. pphe at Divulje (later Golubovci); wfu 14aug94 as useful life-time expired, stored at Golubovci; destroyed on the ground at Golubovci by a NATO air raid during Operation "Allied Force" may99
4912519 Ка-25ПЛ 11323 ВВС Югославии, toc 22nov74
opb 784. pphe at Divulje (later Golubovci); grounded from jun94; wfu 14aug94 as useful life-time expired, stored at Golubovci; last flight 16sep98 (from Golubovci to Belgrade); t/t 1,485.24 hours and 1,884 cycles; preserved in Muzej Jugoslovenskog Vazduhoplovstva at Belgrade
4912520 Ка-25ПЛ 11324 ВВС Югославии, toc 22nov74
opb 784. pphe/97. ab at Divulje; sent to 770 ARZ at Kacha for rework in the late 1980s and never returned
The first digit of the c/n being the year built (1974), followed by the 9 for factory # 99 (built by UUAZ at Ulan Ude-Vostochny) and a figure 1 for which the explanation is unknown. The last four digits seem to be the batch number and the number in the batch.
Source:
http://aviaforum.ru/showthread.php?t=35809Rgd,
Jeroen