The Wyvern Standard

Wyvern is a global leader in aviation safety auditing, consulting and information services. Corporate flight departments, travel departments, fractional programs and charter brokers use Wyvern as their primary source of aviation safety information. The Wyvern SIR/PASS system provides charter buyers with timely and crucial operator, aircraft and crew safety information.

Keystone Aviation has demonstrated a commitment to aviation safety by undergoing annual audits to ensure that our operations and maintenance practices adhere to The Wyvern Standard.


ARGUS International, Inc. (ARGUS), is a specialized aviation services company with global expertise. Their mission is to provide the aviation marketplace with the information needed to make informed decisions and manage risk. ARGUS services include the CHEQ proprietary charter operator rating and due diligence program, TRAQPak market intelligence data and research services, and aviation consulting.

ARGUS subsidiaries include ARGUS PROS, the leading provider of on-site safety audits and PRISM, the industry’s most advanced Safety Management Systems (SMS) solutions provider and recognized certification consultant.

Active NATA Safety 1st Participant

Keystone Aviation is an active participant in NATA’s Safety 1st program and a proud member of the Utah Safety Council to insure uncompromising Safety, Service and Quality to our customers.

ACSF Registered Operator of the Industry Audit Standard

As a member of the Air Charter Safety Foundation (ACSF) and a Registered Operator of the Industry Audit Standard (IAS), you can fly confidently knowing that Keystone Aviation's operation meets the highest standards of safety and security for the charter industry. We recognize that the independent evaluation of our Safety Management System (SMS) through the IAS is critical to maintaining continuous safety improvements and a healthy corporate culture.

The Air Charter Safety Foundation’s (ACSF) Industry Audit Standard (IAS) is a revolutionary audit program that provides a comprehensive, independent review of an operator’s adherence to safety and security regulations. The ACSF Industry Audit Standard (IAS) is the only audit that specifically evaluates compliance with Federal Aviation Administration (FAA) Part 135 (and/or 91 Subpart K) regulations. The IAS requires an SMS to be in place and evaluates the SMS based upon published International Civil Aviation Organization and FAA standards. Operators must adopt and implement operational risk assessment. An on-site IAS audit is required every 24 months.

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