Helicopter Accidents Reconstruction Expert Witnesses: 4

Rapperport Associates, Inc., provides exceptional capability in Failure Analysis, Fire and Explosion Investigation, Accident Reconstruction, Structural Analysis, Mechanical and Electrical Engineering, Metallurgy and Materials Science. We have provided superior technical support for litigation since 1974, and possess an extraordinarily talented technical team with impeccable academic and industrial credentials and proven analysis capability. Our team of distinguished scientists and engineers is drawn principally from Massachusetts Institute of Technology (M.I.T.) and Stanford University. 

AREAS OF EXPERTISE:

Failure Analysis Structural Design Analysis Metallurgical Failures Finite Element Stress Analysis Fracture and Fatigue Analysis Scanning Electron Microscopy Corrosion

Accident Reconstruction Automobiles / Trucks Biomechanics / Injury Mechanism Off-Road Vehicles Occupant Motion Aircraft Animation

Fire & Explosion Analysis Cause and Origin Electrical Gases, Liquids and Dust Industrial Processes

Safety Machine and Industrial Safety Machine Guarding Construction Failures Slips, Trips, Falls

Engineering

• Mechanical
• Structural / Civil
• Metallurgy
• Materials Science
• Aeronautics and Astronautics
• Electrical

Byron Birkedahl, founder and sole expert of HyMasa LLC, has over 41 years of experience in Aviation Electronic Systems at a fortune 100 aerospace company with the most recent role as the Senior Chief Engineer of Advanced Air Mobility and Next Generation Avionics.

Mr. Birkedahl has performed numerous safety assessments of aircraft incidents and served as an advisor to the FAA on new regulatory guidelines. He is an Engineering Fellow / System Architect and Flight Test Engineer credited with creating models and simulations of EVTOL dynamics, propulsion, flight controls and sensors for electronic system design analysis and real time simulator demonstrations. 

Mr. Birkedahl has 11 patents to his name (3 pending) and is responsible for creating control laws for autopilots and flight directors certified on numerous aircraft.

Experience (selected):

• Creation and approval of certification documents and safety analyses
• Knowledge of regulations and architectures of aircraft electronic systems
• Interface and presentations to worldwide aviation regulators (e.g. FAA, EASA, ANAC, CAA, Transport Canada) for the certification of aircraft electronic system
• Establishing the preliminary assessment of safety vs non-safety for aircraft incidents
• Conducting the FAA's Transport Airplane Risk Assessment Methodology (TARAM) of several aircraft incidents and coordination with the FAA of the results
• Analysis of Flight recorder data on a very high-profile accident and meetings with the NTSB on findings

Litigation Support - Mr. Birkedahl has extensive experience in aviation electronic systems that can assist in areas such as aviation accident litigation cases or the evaluation of start-up company viability / risk for investors. His services are available to attorneys representing plaintiff and defendant and government agencies.

Areas of Expertise:

• Presentation Communications with Aviation Regulators (worldwide)
• Aviation Modeling / Analytics / Simulation / Control Laws
• Lead Architect of Complex Aviation Electronic Systems
• Communications to Corporate Leadership and Aircraft OEMs
• Aviation Hazard / Safety Assessments

View HyMasa, LLC's Business Consultant Profile.

Keith M. Cianfrani, MAS, CRSP, a retired U.S. Army Lieutenant Colonel, the founder and owner, has over 30 years of aviation experience. He is a master army aviator, aviation safety officer, commercial pilot, instructor pilot, and was an accident investigator for the U.S. Army Safety Center.

Background - Mr. Cianfrani is rated in both rotary wing and fixed wing aircraft. As a safety officer, he has managed safety programs in organizations with over 100 aircraft stationed throughout 5 states. Mr. Cianfrani is currently an instructor for Embry Riddle Aeronautical University and Kansas State University. He is also presently attending Florida Institute of Technology (FIT) as a PhD Student in Aviation Science.

Mr. Cianfrani is a certified Flight Instructor (CFI) and has also worked in the civilian, commercial aviation industry. He has been flying for companies such as Petroleum Helicopters, Damin Aviation, Keystone Helicopters, Island Helicopters, and Chopper 6 and Chopper 3 in Philadelphia. He also has experience in the flight for life, aero medical evacuation industry.

Litigation Support - Keith Cianfrani specializes in Human Factors and Material Failure in Aviation Accident Investigations. He serves as an aviation safety consultant for the Federal Aviation Administration and FIT. An IS-BAO Certified Safety Auditor, he provides safety evaluations in accordance with Federal Aviation Regulations. His services are available nationally and internationally and include written reports, depositions, and trial testimony as needed.

Areas of Expertise:

Pilot / Crew Performance Human Factors Maintenance Environmental Factors Meteorological Factors

Safety Training Material Factors Aviation Accident Reconstruction FAA Regulatory Compliance Safety Audits

View Keith Cianfrani's Consulting Profile.

Larry Grandy has over 46 years of progressive experience and knowledge in Aviation Operations, holding numerous civilian and military ratings and designations. He served for decades as a Career Officer and Squadron Commander in the United States Marine Corps. Mr. Grandy is currently serving as a Flight Instructor and Pilot in Command for a large Aeromedical Helicopter Company. His background includes previous service as an FAA Check Airman. 

Litigation Support - Mr. Grandy's has over 20 years of experience providing Aircraft Accident Investigation and Aviation Operations Research and Analysis, including military and civilian Mishaps. He provides expert witness testimony and consulting to defense and plaintiff attorneys. Excellent attorney references.

Areas of Expertise :Aviation Safety Consulting, Accident Reconstruction, Human Factors, Pilot & Aircrew Actions, FAA,  NTSB.