Design
Safety is the primary consideration when Boeing engineers design an airplane. In addition to meeting regulatory requirements before certification, each airplane model must meet Boeing’s time-proven design standards. Often these standards are more stringent than regulatory requirements.
Regulatory requirements include ensuring redundancy in all critical systems. Every system vital to the safe operation of an airplane has a backup, and in some cases more than one backup.
For example, twin-engine jets are designed to safely take off, fly and land even if one engine fails.
Boeing designs damage-tolerant airplanes. The airplane structure is designed to withstand 150 percent of the greatest load an airplane might encounter in commercial service.
Engineers build in this extra margin of protection to allow a pilot to safely exceed the airplane’s intended flight envelope in case of an extraordinary emergency.