View maintenance manual (Adobe Acrobat PDF Format) - File Size 1MB It is a modern trouble free system embodying the latest "Fail Safe" design philosophy. The simplicity and reliability of the system reduce down time and maintenance cost significantly, and reduce most future overhaul costs. The emergency system of the mechanical gear is only effective in the case of motor failure. Any mechanical failure, such as chain breakage or gear box seizure, will render the emergency system useless (as numerous owners and pilots have discovered). The completely independent, nitrogen operated, emergency extension system of the AVIADESIGN gear is simple and absolutely reliable. The quiet smooth operation eliminates gear in motion noise.