From the data collected, the reliability of the particular airframe engine combination is measured and statistics published.

The goal of employing this system is the survival of the crew and passengers and not necessarily the prevention of damage to the airframe.

As of December 2012, the USAF's F 15E fleet has an average age of 21 years and an average airframe flying time of 6,000 hours.

Since that time, an action plan has been developed and agreed with the goal of requiring States to use proven alternatives in new airframe designs beginning in 2009.

At the critical Mach number, local airflow in some areas near the airframe reaches the speed of sound, even though the aircraft itself has an airspeed lower than Mach 1.0.

The 8115 was never built, as Boeing signed a contract with General Electric to be the sole supplier of engines for the 777X aircraft, owing to GEs willingness to risk share on the airframe part of the project, and sales of the aircraft to GECAS.

Although halons have been phased out in Parties not operating under Article 5 since 1994 and have been significantly reduced in Parties operating under Article 5, halons continue to be used in the aviation industry, both in existing planes and even in the planning of new airframe designs.