Helicopter Bell 412EP Serial 36431 Register XA-UHD used by ASESA (Aeroservicios Especializados SA). Aircraft history and location Aircraft History XA-UHD ASESA 2007-02ASESA, Bell serial N9154R Feb07 2013-08-30visited Centennial deep crude oil platform, off Veracruz. Send Updates Use APP to upload photo @ (optional) When Now? / / Send