Helicopter Sikorsky S-55 Serial 55-727 Register IZ649 used by Bharatiya Vayu Sena (Indian Air Force). Built 1954. Aircraft history and location Aircraft History IZ649 Bharatiya Vayu Sena 1954-06-30Sikorsky S-55 c/n 55-727, ff:? del India Supply Mission as IZ649, 30Jun54. Send Updates Use APP to upload photo @ (optional) When Now? / / Send