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Ralph Rosenbrock
Senior Technical Advisor

Ralph Rosenbrock is the Senior Technical Advisor of The Official Helicopter Blue Book®. Ralph is a member and past chairman of the HAI Economics Committee. He served as a Director of the Helicopter Foundation International for many years. Ralph is a member of the International Society of Air Safety Investigators and is a past President of the Chicago Chapter of the Professional Aviation Maintenance Association. He was awarded two Citations by the Federal Aviation Administration for significant contributions to safety and reliability through improved maintenance practices and has served as an FAA Accident Prevention Counselor. Ralph has received a Meritorious Service Award from the HAI.


Ralph Rosenbrock's 50 plus year career in aviation has included maintenance floor technician, maintenance management, consulting, inventory appraisals, expert witness services, helicopter risk management and flight department management. Ralph holds an FAA A&P license and is a graduate of Lewis College Technical Institute (Lewis University).