EASA Regulations for Hawker Beechcraft HS125

FAA SAIB NM-08-39 - Honeywell Flight Management System (FMS) - Early Descent Behaviour

FAA SAIB NM-08-39 is a Special Airworthiness Information Bulletin addressing premature descent behavior in certain Honeywell Flight Management Systems (FMS) when coupled to VNAV or VGP. The affected FMS units include Honeywell Epic Integrated Avionics and Legacy FMZ-2000 models installed on various aircraft such as Boeing 727 series, Bombardier CL-600 series, Cessna 650, Dassault Falcon series, Gulfstream G-1159, G-IV, GV, and Hawker Beechcraft HS125 and BAe125 series. The bulletin informs operators about incorrect vertical deviation indications that may lead to early descent below the intended flight path during RNAV approaches.