Novemeber 8, 1999

Dear Mr. Mengos,

This letter is to express our appreciation for your dedicated support. Heli-Flite Inc. Aerial Crane Service has benefited greatly by your services over the years. You have helped us trouble shoot numerous vibration problems we've encountered. Your Dedication and Professionalism on rotorcraft from R-22, Hughes 500, Bell 206, Hiller 12C and Sikorsky S-58 have been greatly appreciated. We would recommend you and your services to anyone in need of this assistance.Good luck with your endeavor and we look forward to talking to you in the future.

Scott A. Donley, HELI-FLITE INC.