Final answer:
The Boeing 737 first entered service in 1968 and became an important aircraft in the commercial aviation industry.
Step-by-step explanation:
The question pertains to the Boeing 737, but the provided information is about the Boeing 777 and the incident known as the Gimli Glider involving a Boeing 767.
To answer the original question, the Boeing 737 first entered service in 1968. This aircraft model quickly became a staple in the commercial aviation industry due to its reliability and efficiency.