Editing ARTICLE (section)

=== Original Series (1967–1988) ===
The 737 was conceived as a shorter, lower-cost twinjet to complement Boeing's 707 and 727. The initial -100 model (first flight April 9, 1967) was followed by the lengthened -200, which became more popular. Key features included:
* Pratt & Whitney JT8D low-bypass turbofan engines
* Capacity for 85–124 passengers
* Mechanical flight controls