Providing in-depth Aero Engine Expert Witness support for all commercial aircraft

Complexity is an unavoidable feature of aviation and the causes of industrial and legal disputes are wide-ranging.  Our expert, Trish Gray, has over 38 years of industry experience and in-depth knowledge of technical management, contract negotiations, and costings relating to aircraft engines.

Operating in multiple sectors, we assist clients involved in contentious commercial negotiations and have represented airlines, lessors, engine manufacturers, and maintenance organisations to successful outcomes. We provide expert witness assistance in the following areas:

  • Initial advice to validate claims
  • Dispute advice
  • Insurance claims
  • Repossessions
  • Breach of contract

Our professional consultants have wide-ranging experience in all aspects of engine management. We support barristers and law firms to establish an understanding of complex technical issues and provide extensive evidence to validate our clients’ claims, together with producing the required documentation to present in court.

TGIS Aviation appreciates the high costs of litigation, both in time and financially. Our experts offer early intervention advice and solutions, avoiding the need for parties to engage in costly legal action.


Our in-house expert witness professional, Trish Gray, is a member of the Expert Witness Institute and holds a Cardiff University Law School Bond Solon Expert Witness Certificate.

What Our Clients Say

“Trish Gray’s deep expertise was obvious when she gave evidence. She came across as an expert on whose opinion the tribunal could rely – and they did.”

Senior City Disputes Partner