Helicopter Sikorsky S-58B Serial 58-140 Register N748A used by Sikorsky Helicopters. Built 1955. Aircraft history and location Aircraft History N748A Sikorsky Helicopters 1955-11-18Sikorsky S-58B, cn 58-140, ff:18Nov55 reg Sikorsky as N748A, 18Nov55 soc Jul72. Send Updates Use APP to upload photo @ (optional) When Now? / / Send