Here are the results of an O-1 search that was done on  https://www.vietnamairlosses.com

 

  1. 1 August 1963: O-1F Bird Dog; Ser # unknown; USAF; 19 TASS, 34 TG; Bien Hoa
  2. 20 December 1963: O-1F Bird Dog; Ser # 57-2831; USAF; 19 TASS, 34 TG; Bien Hoa
  3. 26 March 1964: O-1F Bird Dog; Ser # 55-4695; USAF; 19 TASS, 34 TG; Bien Hoa detached to Khe Sanh
  4. 7 November 1964: O-1F Bird Dog; Ser # 57-2828; USAF; 1 ACS, 34 TG; Bien Hoa
  5. 31 December 1964: O-1F Bird Dog; Ser # 57-2823; USAF; 366 TFS; Da Nang
  6. 12 January 1965: O-1F Bird Dog; Ser # 55-4712; USAF; 19 TASS, 34 TG; Bien Hoa
  7. 15 January 1965: O-1F Bird Dog; Ser # 57-2806; USAF; 19 TASS, 34 TG; Bien Hoa
  8. 9 March 1965: O-1F Bird Dog; Ser # 55-4719; USAF; 19 TASS, 34 TG; Bien Hoa
  9. 28 April 1965: O-1A Bird Dog; Ser # unknown; USAF; 33 ABS; Tan Son Nhut
  10. 9 May 1965: O-1F Bird Dog; Ser # 57-2896; USAF; 19 TASS, 34 TG; Bien Hoa
  11. 12 May 1965: O-1F Bird Dog; Ser # 57-2781; USAF; 19 TASS, 34 TG; Bien Hoa
  12. 30 June 1965: O-1F Bird Dog; Ser # 55-4649; USAF; 19 TASS, 34 TG; Bien Hoa
  13. 7 July 1965: O-1F Bird Dog; Ser # 57-2944; USAF; 19 TASS, 34 TG; Bien Hoa
  14. 22 July 1965: O-1F Bird Dog; Ser # 56-4218; USAF; 20 TASS, 6250 TASG; Da Nang
  15. 5 August 1965: O-1F Bird Dog; Ser # 57-2801; USAF; 19 TASS, 6250 TASG; Bien Hoa
  16. 11 August 1965: O-1E Bird Dog; Ser # 56-2494; USAF; 19 TASS, 6250 TASG; Bien Hoa
  17. 13 August 1965: O-1F Bird Dog; Ser # 57-6274; USAF; 6253 CSG; Nha Trang
  18. 27 August 1965: O-1E Bird Dog; Ser # 57-6271; USAF; 6253 CSG; Nha Trang
  19. 29 August 1965: O-1F Bird Dog; Ser # 56-2530; USAF; TASS, 6250 TASG; Bien Hoa
  20. 18 September 1965: O-1E Bird Dog; Ser # 56-4167; USAF; unit unknown; base unknown
  21. 18 October 1965: O-1E Bird Dog; Ser # 56-2600; USAF; 20 TASS, 6250 TASG; Da Nang
  22. 23 October 1965: O-1E Bird Dog; Ser # 56-2624; USAF; 19 TASS, 6250 TASG; Bien Hoa
  23. 1 November 1965: O-1E Bird Dog; Ser # 56-2508; USAF; 21 TASS, 6250 TASG; Pleiku
  24. 2 November 1965: O-1F Bird Dog; Ser # 57-2964; USAF; 19 TASS, 6250 TASG; Bien Hoa
  25. 18 November 1965: O-1E Bird Dog; Ser # 56-2544, 56-2585, 56-2587, 56-2675, 56-4228; USAF; 505 TCG; Ben Trang
  26. 21 November 1965: O-1E Bird Dog; Ser # 56-2535; USAF; 21 TASS, 505 TACG; Pleiku
  27. 7 December 1965: O-1E Bird Dog; Ser # 55-4675; USAF; 19 TASS, 505 TACG; Bien Hoa
  28. 14 December 1965: O-1E Bird Dog; Ser # 56-4191; USAF; 21 TASS, 505 TACG; Pleiku
  29. 17 December 1965: O-1E Bird Dog; Ser # 57-2873; USAF; 19 TASS, 505 TACG; Bien Hoa
  30. 24 December 1965: O-1E Bird Dog; Ser # 56-4166; USAF; 21 TASS, 505 TACG; Pleiku
  31. 2 January 1966: O-1F Bird Dog; Ser # 57-2889; USAF; 19 TASS, 505 TACG; Bien Hoa
  32. 5 January 1966: O-1E Bird Dog; Ser # 56-4171; USAF; probably 20 TASS, 505 TACG; Da Nang detached to Khe Sanh
  33. 2 February 1966: O-1E Bird Dog; Ser # 56-2493; USAF; probably 19 TASS, 505 TACG; Bien Hoa detached to Tan Son Nhut
  34. 8 February 1966: O-1E Bird Dog; Ser # 56-2621; USAF; 22 TASS, 505 TACG; Binh Thuy
  35. 2 March 1966: O-1E Bird Dog; Ser # 56-2529; USAF; 21 TASS, 505 TACG; Pleiku
  36. 2 March 1966: O-1F Bird Dog; Ser # 57-2902; USAF; Det 3, 505 TACG; Nakhon Phanom
  37. 4 March 1966: O-1E Bird Dog; Ser # 56-2499; USAF; 21 TASS, 505 TACG; Pleiku
  38. 15 March 1966: O-1E Bird Dog; Ser # 56-2530; USAF; 22 TASS, 505 TACG; Binh Thuy detached to Khe Sanh
  39. 21 March 1966: O-1E Bird Dog; Ser # 56-2617; USAF; unit unknown; base unknown
  40. 4 April 1966: O-1F Bird Dog; Ser # 57-2787; USAF; 19 TASS, 505 TACG; Bien Hoa
  41. 13 April 1966: O-1E Bird Dog; Ser # unknown; USAF; 22 TASS, 505 TACG; Binh Thuy
  42. 19 April 1966: O-1F Bird Dog; Ser # 57-2800; USAF; Det 3, 505 TACG; Nakhon Phanom
  43. 6 May 1966: O-1F Bird Dog; Ser # 57-2856; USAF; 630 CSG; Udorn
  44. 13 May 1966: O-1E Bird Dog; Ser # 56-2680; USAF; 20 TASS, 505 TACG; Da Nang detached to Nha Trang
  45. 18 May 1966: O-1F Bird Dog; Ser # 57-2877; USAF; 23 TASS, 505 TACG; Nakhon Phanom
  46. 24 May 1966: O-1F Bird Dog; Ser # 57-6028; USAF; 21 TASS, 505 TACG; Pleiku
  47. 2 June 1966: O-1F Bird Dog; Ser # 57-2832; USAF; 23 TASS, 505 TACG; Nakhon Phanom
  48. 5 June 1966: O-1E Bird Dog; Ser # 56-2647; USAF; 14 ACW; Nha Trang
  49. 7 June 1966: O-1E Bird Dog; Ser # 55-4736; USAF; 19 TASS, 505 TACG; Bien Hoa
  50. 8 June 1966: O-1E Bird Dog; Ser # 56-2614; USAF; 14 ACW; Nha Trang
  51. 10 June 1966: O-1E Bird Dog; Ser # 56-4178; USAF; 20 TASS, 505 TACG; Da Nang
  52. 22 June 1966: O-1F Bird Dog; Ser # 55-4653; USAF; 23 TASS, 505 TACG; Nakhon Phanom
  53. 2 July 1966: O-1E Bird Dog; Ser # 56-2521; USAF; 23 TASS, 505 TACG; Nakhon Phanom
  54. 23 July 1966: O-1E Bird Dog; Ser # 57-6268; USAF; 20 TASS, 505 TACG; Da Nang
  55. 24 July 1966: O-1E Bird Dog; Ser # 56-4193; USAF; probably 19 TASS, 505 TACG; Bien Hoa
  56. 1 August 1966: O-1E Bird Dog; Ser # 56-2550; USAF; 20 TASS, 505 TACG; Da Nang detached to Tan Son Nhut
  57. 10 September 1966: O-1E Bird Dog; Ser # 56-4184; USAF; 21 TASS, 505 TACG; Pleiku
  58. 13 September 1966: O-1G Bird Dog; Ser # 55-11918; USAF; 19 TASS, 505 TACG; Bien Hoa
  59. 27 September 1966: O-1E Bird Dog; Ser # 56-2656; USAF; 21 TASS, 14 ACW; Pleiku
  60. 8 October 1966: O-1E Bird Dog; Ser # 56-2610; USAF; 20 TASS, 505 TACG; Da Nang
  61. 9 October 1966: O-1E Bird Dog; Ser # 51-12041; USAF; 21 TASS, 14 ACW; Nha Trang
  62. 31 October 1966: O-1E Bird Dog; Ser # 55-4669; USAF; 19 TASS, 505 TACG; Bien Hoa
  63. 7 November 1966: O-1E Bird Dog; Ser # 56-4200; USAF; 20 TASS, 505 TACG; Da Nang
  64. 7 November 1966: O-1G Bird Dog; Ser # 50-1737; USAF; 20 TASS, 505 TACG; Da Nang
  65. 9 November 1966: O-1E Bird Dog; Ser # probably 56-2489; USAF; 21 TASS, 14 ACW; Nha Trang
  66. 23 November 1966: O-1E Bird Dog; Ser # 56-4188; USAF; 21 TASS, 14 ACW; Nha Trang detached to Tuy Hoa
  67. 30 December 1966: O-1G Bird Dog; Ser # 51-11955; USAF; 21 TASS, 504 TASG; Nha Trang
  68. 2 January 1967: O-1F Bird Dog; Ser # 57-2858; USAF; 23 TASS, 504 TASG; Nakhon Phanom
  69. 17 January 1967: O-1F Bird Dog; Ser # 57-2789; USAF; 23 TASS, 504 TASG; Nakhon Phanom
  70. 20 January 1967: O-1G Bird Dog; Ser # 51-4851; USAF; 21 TASS, 504 TASG; Nha Trang detached to Pleiku
  71. 25 January 1967: O-1F Bird Dog; Ser # 55-4730; USAF; 19 TASS, 504 TASG; Bien Hoa
  72. 6 February 1967: O-1F Bird Dog; Ser # 57-2807; USAF; 23 TASS, 504 TASG; Nakhon Phanom
  73. 23 February 1967: O-1E Bird Dog; Ser # 56-4182; USAF; 20 TASS, 504 TASG; Da Nang detached to Khe Sanh
  74. 24 February 1967: O-1G Bird Dog; Ser # 51-5078; USAF; 21 TASS, 504 TASG; Nha Trang
  75. 28 February 1967: O-1E Bird Dog; Ser # 56-4195; USAF; 20 TASS, 504 TASG; Da Nang detached to Dong Ha
  76. 9 March 1967: O-1E Bird Dog; Ser # 56-2517; USAF; 21 TASS, 504 TASG; Nha Trang
  77. 20 March 1967: O-1E Bird Dog; Ser # 56-2518; USAF; 21 TASS, 504 TASG; Nha Trang detached to Qui Nhon
  78. 20 March 1967: O-1G Bird Dog; Ser # 51-5150; USAF; 19 TASS, 504 TASG19 TASS, 504 TASG; Bien Hoa detached to Dau Tieng
  79. 25 March 1967: O-1E Bird Dog; Ser # 56-2509; USAF; 21 TASS, 504 TASG; Nha Trang
  80. 6 April 1967: O-1E Bird Dog; Ser # 51-5074; USAF; 20 TASS, 504 TASG; Da Nang
  81. 6 April 1967: O-1E Bird Dog; Ser # 56-2613, 56-2654; USAF; 504 TASG; Quang Tri
  82. 23 April 1967: O-1G Bird Dog; Ser # 50-1393; USAF; 19 TASS, 504 TASG; Bien Hoa
  83. 28 April 1967: O-1G Bird Dog; Ser # 51-16950; USAF; 21 TASS, 504 TASG; Nha Trang detached to Tuy Hoa
  84. 12 May 1967: O-1G Bird Dog; Ser # 51-12825; USAF; 19 TASS, 504 TASG; Bien Hoa
  85. 22 May 1967: O-1E Bird Dog; Ser # 51-12102; USAF; 20 TASS, 504 TASG; Da Nang
  86. 5 June 1967: O-1G Bird Dog; Ser # 50-1640; USAF; 20 TASS, 504 TASG; Da Nang detached to An Khe
  87. 23 June 1967: O-1G Bird Dog; Ser # 51-12060; USAF; 20 TASS, 504 TASG; Da Nang
  88. 10 July 1967: O-1E Bird Dog; Ser # 56-4175; USAF; 21 TASS, 504 TASG; Nha Trang
  89. 26 July 1967: O-1E Bird Dog; Ser # 57-6270; USAF; 20 TASS, 504 TASG; Da Nang
  90. 6 August 1967: O-1F Bird Dog; Ser # 57-2825; USAF; 20 TASS, 504 TASG; Da Nang
  91. 6 August 1967: O-1E Bird Dog; Ser # 56-2536, 56-2672; USAF; 20 TASS, 504 TASG; Da Nang
  92. 10 August 1967: O-1G Bird Dog; Ser # 51-12409; USAF; 19 TASS, 504 TASG; Bien Hoa detached to Rach Gia
  93. 22 August 1967: O-1E Bird Dog; Ser # 56-2589; USAF; 20 TASS, 504 TASG; Da Nang
  94. 6 September 1967: O-1F Bird Dog; Ser # 57-2978; USAF; 21 TASS, 504 TASG; Nha Trang
  95. 7 September 1967: O-1E Bird Dog; Ser # 56-4177; USAF; 19 TASS, 504 TASG; Bien Hoa
  96. 21 September 1967: O-1E Bird Dog; Ser # 56-2516; USAF; 20 TASS, 504 TASG; Da Nang
  97. 12 October 1967: O-1G Bird Dog; Ser # 51-12098; USAF; 19 TASS, 504 TASG; Bien Hoa
  98. 16 October 1967: O-1E Bird Dog; Ser # 56-2503; USAF; 20 TASS, 504 TASG; Da Nang
  99. 17 October 1967: O-1E Bird Dog; Ser # probably 56-2601; USAF; 21 TASS, 504 TASG; Nha Trang
  100. 29 October 1967: O-1E Bird Dog; Ser # 56-2640; USAF; 21 TASS, 504 TASG; Nha Trang
  101. 15 November 1967: O-1G Bird Dog; Ser # 51-16876; USAF; 22 TASS, 504 TASG; Binh Thuy
  102. 25 November 1967: O-1G Bird Dog; Ser # 51-4799; USAF; 19 TASS, 504 TASG; Bien Hoa
  103. 28 November 1967: O-1G Bird Dog; Ser # 51-12861; USAF; 19 TASS, 504 TASG; Bien Hoa detached to Rach Gia
  104. 5 December 1967: O-1F Bird Dog; Ser # 52-2862; USAF; 19 TASS, 504 TASG; Bien Hoa
  105. 16 December 1967: O-1G Bird Dog; Ser # 51-12097; USAF; 21 TASS, 504 TASG; Nha Trang
  106. 14 January 1968: O-1G Bird Dog; Ser # 51-12750; USAF; 21 TASS, 504 TASG; Nha Trang
  107. 1 February 1968: O-1F Bird Dog; Ser # 57-2864, 57-2870; USAF; 19 TASS, 504 TASG; Bien Hoa detached to Hue
  108. 1 February 1968: O-1E Bird Dog; Ser # 51-4741, 56-4223; USAF; 20 TASS, 504 TASG; Da Nang detached to Hue
  109. 4 February 1968: O-1E Bird Dog; Ser # 56-4201; USAF; 22 TASS, 504 TASG; Binh Thuy
  110. 6 February 1968: O-1E Bird Dog; Ser # 53-7994; USAF; 19 TASS, 504 TASG; Bien Hoa detached to Tay Ninh
  111. 11 February 1968: O-1E Bird Dog; Ser # 56-2491; USAF; 19 TASS, 504 TASG; Bien Hoa
  112. 12 February 1968: O-1G Bird Dog; Ser # 51-11993; USAF; 19 TASS, 504 TASG; Bien Hoa
  113. 25 February 1968: O-1E Bird Dog; Ser # 56-2512; USAF; 20 TASS, 504 TASG; Da Nang
  114. 5 March 1968: O-1F Bird Dog; Ser # 57-2813; USAF; 21 TASS, 504 TASG; Nha Trang
  115. 7 March 1968: O-1G Bird Dog; Ser # 51-12013; USAF; 19 TASS, 504 TASG; Bien Hoa
  116. 12 March 1968: O-1G Bird Dog; Ser # 51-12030; USAF; 19 TASS, 504 TASG; Bien Hoa
  117. 18 March 1968: O-1G Bird Dog; Ser # 51-12108; USAF; 21 TASS, 504 TASG; Nha Trang
  118. 19 March 1968: O-1E Bird Dog; Ser # 51-4899; USAF; 21 TASS, 504 TASG; Nha Trang
  119. 20 March 1968: O-1G Bird Dog; Ser # 51-16871; USAF; 19 TASS, 504 TASG; Bien Hoa
  120. 23 March 1968: O-1F Bird Dog; Ser # 57-2796; USAF; 21 TASS, 504 TASG; Nha Trang
  121. 23 March 1968: O-1F Bird Dog; Ser # 57-2814; USAF; 19 TASS, 504 TASG; Bien Hoa
  122. 28 March 1968: O-1F Bird Dog; Ser # 57-2809; USAF; 21 TASS, 504 TASG; Nha Trang
  123. 15 April 1968: O-1G Bird Dog; Ser # 51-7480; USAF; 19 TASS, 504 TASG; Bien Hoa
  124. 23 April 1968: O-1G Bird Dog; Ser # 53-7997; USAF; 20 TASS, 504 TASG; Da Nang
  125. 30 April 1968: O-1G Bird Dog; Ser # 51-12438; USAF; 19 TASS, 504 TASG; Bien Hoa
  126. 4 May 1968: O-1G Bird Dog; Ser # 51-11976; USAF; 19 TASS, 504 TASG; Bien Hoa
  127. 10 May 1968: O-1E Bird Dog; Ser # 56-2469; USAF; 20 TASS, 504 TASG; Da Nang
  128. 17 May 1968: O-1F Bird Dog; Ser # 57-2980; USAF; 21 TASS, 504 TASG; Nha Trang
  129. 18 May 1968: O-1E Bird Dog; Ser # 56-2520; USAF; 22 TASS, 504 TASG; Binh Thuy
  130. 28 May 1968: O-1G Bird Dog; Ser # 51-4949; USAF; 19 TASS, 504 TASG; Bien Hoa
  131. 9 June 1968: O-1E Bird Dog; Ser # 56-4176; USAF; 20 TASS, 504 TASG; Da Nang
  132. 14 June 1968: O-1E Bird Dog; Ser # 56-2635; USAF; 22 TASS, 504 TASG; Binh Thuy
  133. 16 June 1968: O-1F Bird Dog; Ser # 57-2932; USAF; 21 TASS, 504 TASG; Nha Trang
  134. 5 July 1968: O-1G Bird Dog; Ser # unknown; USAF; 21 TASS, 504 TASG; Nha Trang
  135. 18 July 1968: O-1G Bird Dog; Ser # 51-12555; USAF; 21 TASS, 504 TASG; Nha Trang
  136. 17 September 1968: O-1E Bird Dog; Ser # 56-2556; USAF; 20 TASS, 504 TASG; Da Nang
  137. 24 September 1968: O-1G Bird Dog; Ser # 51-4570; USAF; 19 TASS, 504 TASG; Bien Hoa
  138. 2 October 1968: O-1F Bird Dog; Ser # 57-2827; USAF; 21 TASS, 504 TASG; Nha Trang
  139. 16 October 1968: O-1E Bird Dog; Ser # 51-5001; USAF; 19 TASS, 504 TASG; Bien Hoa
  140. 16 October 1968: O-1E Bird Dog; Ser # 56-2651; USAF; 19 TASS, 504 TASG; Bien Hoa
  141. 11 November 1968: O-1F Bird Dog; Ser # 57-2952; USAF; 21 TASS, 504 TASG; Nha Trang
  142. 14 November 1968: O-1E Bird Dog; Ser # 56-4207; USAF; 19 TASS, 504 TASG; Bien Hoa
  143. 16 November 1968: O-1F Bird Dog; Ser # 57-2820; USAF; 21 TASS, 504 TASG; Nha Trang detached to Pleiku
  144. 11 January 1969: O-1G Bird Dog; Ser # 51-16951; USAF; 22 TASS, 504 TASG; Binh Thuy
  145. 22 February 1969: O-1E Bird Dog; Ser # 56-4227; USAF; 504 TASG; Dau Tieng
  146. 10 March 1969: O-1E Bird Dog; Ser # 56-2497; USAF; 22 TASS, 504 TASG; Binh Thuy
  147. 24 March 1969: O-1E Bird Dog; Ser # unknown; USAF; 20 TASS, 504 TASG; Da Nang
  148. 17 April 1969: O-1F Bird Dog; Ser # 57-2833; USAF; 504 TASG; Da Lat
  149. 5 June 1969: O-1F Bird Dog; Ser # 57-2981; USAF; 504 TASG; Phan Thiet
  150. 6 June 1969: O-1G Bird Dog; Ser # 51-12824; USAF; 20 TASS, 504 TASG; Da Nang
  151. 9 July 1969: O-1G Bird Dog; Ser # 51-5103; USAF; 21 TASS, 504 TASG; Nha Trang
  152. 14 July 1969: O-1E Bird Dog; Ser # 51-12505; USAF; 19 TASS, 504 TASG; Bien Hoa detached to Quan Loi
  153. 14 August 1969: O-1G Bird Dog; Ser # 51-5097; USAF; 22 TASS, 504 TASG; Binh Thuy
  154. 22 August 1969: O-1E Bird Dog; Ser # 56-2663; USAF; unit unknown; base unknown
  155. 5 November 1969: O-1G Bird Dog; Ser # 156680; USAF; unit unknown; base unknown
  156. 16 November 1969: O-1F Bird Dog; Ser # 57-2867; USAF; 21 TASS, 504 TASG; Cam Ranh Bay
  157. 20 November 1969: O-1E Bird Dog; Ser # 56-2657; USAF; 19 TASS, 504 TASG; Bien Hoa
  158. 27 December 1969: O-1G Bird Dog; Ser # 50-1719; USAF; unit unknown; Tuy Hoa
  159. 10 January 1970: O-1G Bird Dog; Ser # 51-7441; USAF; 504 TASG; base unknown
  160. 29 January 1970: O-1F Bird Dog; Ser # 57-2868; USAF; 21 TASS, 504 TASG; Cam Ranh Bay detached to Ban Me Thuot
  161. 31 March 1970: O-1F Bird Dog; Ser # 57-2883; USAF; 504 TASG; Gia Nghia
  162. 9 May 1970: O-1E Bird Dog; Ser # 56-2519; USAF; 22 TASS, 504 TASG; Binh Thuy
  163. 4 June 1970: O-1E Bird Dog; Ser # 56-2620; USAF; 22 TASS, 504 TASG; Binh Thuy detached to Chau Doc
  164. 9 June 1970: O-1F Bird Dog; Ser # 57-2890; USAF; 21 TASS, 504 TASG; Cam Ranh Bay detached to Pleiku
  165. 22 November 1970: O-1E Bird Dog; Ser # 56-4189; USAF; 22 TASS, 504 TASG; Binh Thuy
  166. 20 February 1971: O-1F Bird Dog; Ser # 57-2872; USAF; 21 TASS, 504 TASG; Cam Ranh Bay
  167. 5 August 1971: O-1 Bird Dog; Ser # 51-12768; USAF; unit unknown; base unknown
  168. 18 October 1971: O-1 Bird Dog; Ser # unknown; USAF; 483 TAW; Cam Ranh Bay
  169. 14 May 1972: O-1 Bird Dog; Ser # unknown; USAF; unit unknown; base unknown
  170. 2 July 1972: O-1 Bird Dog; Ser # unknown; USAF; unit unknown; base unknown

 

 

 

 

 

 

DHTML Menu By Milonic JavaScript