By purchasing or using a ProFlight Checklist™ Purchaser / user understand the following; The purchaser / user assumes all responsibility pertaining to safety of passengers & operation of the aircraft. No warranties are made concerning our products, either implied or expressed. This product is not a substitute for any operations manual which coinsides with each specific aircraft. Purchaser consents and understands ProFlight Checklists™ and any other entities envolved bears no responsibility for death, injury, or damages to property.