Dassault Falcon Jet is pleased to offer an STC to upgrade the existing obsolete LASEREF II and III IRUs to the latest version, LASEREF IV. The DAS STC is available for Falcon 900A/B/C/EX and Falcon 2000/EX aircraft, and is coming soon to the Falcon 50/EX.
LASEREF II and III became obsolete and Honeywell is no longer supporting these legacy products as of January 1, 2020. The LASEREF IV upgrade provides a simple unit replacement that brings benefits to the end user for many years to come. The LASEREF IV IRU is a Ring Laser Gyro (RLG) based inertial reference unit (IRU), providing Honeywell’s proven laser inertial technology in the lightest 4 MCU rack mountable package. The IRU calculates and delivers navigation data such as aircraft attitude (roll, pitch), true heading, magnetic heading, and longitudinal acceleration to the Flight Management System and the display system.
The LASEREF II and III IRUs have been very reliable; however, they are aging and a failed IRU could impact aircraft operations and result in an AOG situation. Dassault Falcon Jet highly recommends completing the LASEREF IV upgrade as soon as possible. You can find more information here; please contact your DFJ MRO Regional Sales Manager for more details.