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215 Rotary-wing Aircraft Assets Available to Support Operation OH-6A (Cayuse) 5 OH-58 (Kiowa) 59 UH-1C (Huey gunship) 60 UH-1H (Huey) 312 AH-1G (Cobra) 117 CH-47 (Chinook) 80 CH-53 (Sea Stallion) 16 CH-54 (Skycrane) 10 Total 659 Sorties Type Sortie In RVN In Laos Gunship 17,159 17, 014 Troop Lift 37,681 13,098 Medevac 1,829 909 Air Cavalry 10,603 7,284 Logistic Support 51,342 7,523 Total 118,614 45,828 Losses Type Aircraft Nonhostile Hostile Damaged Lost Damaged Lost OH-6A (Cayuse) — 1 25 9 OH-58 (Kiowa) — 15 6 UH-1C (Huey gunship) 1 — 62 8 UH-1H (Huey) 2 1 314 52 AH-1G (Cobra) 1 2 157 24 CH-47 (Chinook) — — 26 3 Total 4 4 601 102* Sources: Headquarters, US Military Assistance Command,Vietnam, Command History, 1971, 2: E-38–39; Headquarters, 101st Airborne Division (Airmobile), Final Report: 101st Airborne Division Airmobile Operations in Support of Operation Lam Son 719, 8 February–6 April 1971, 2 vols., Camp Eagle, RVN, 1 May 1971. Note: One USMC CH-53D Sea Stallion from HMH-463 was lost to ground fire on 23 February while attempting to lift a howitzer from FSB Hotel II.Another CH-53D exploded in midair and crashed northeast of Marble Mountain after returning from a support mission in Laos (Graham A. Cosmas and Lt. Col.Terrence P. Murray, US Marines in Vietnam:Vietnamization and Redeployment, 1970–1971, 204).The South Vietnamese Air Force lost seven helicopters during the operation. *Maj. Gen. Nguyen Duy Hinh, Lam Son 719, Indochina Monographs, 135. Hinh reports 108 helicopters destroyed and 618 damaged; several 101st Airborne Division documents reflect 107 helicopters destroyed. APPENDIX 4 US Army Aviation Summary, Operation Lam Son 719 30 January–7 April 1971 ...

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