Why The Boeing 737-200's Gravel Kit Let It Land On Dirt & Will Never Be Built Into A Modern Jet

The Boeing 737-200’s gravel kit enabled operators to land and take off from unpaved strips, expanding where the short-haul jet could be used and why the option was eventually phased out. Boeing offered the optional Unpaved Strip Kit from early 1969, but it was only available for the first generation of 737s: the 737-100 and especially the 737-200. The kit let airports with grass, dirt, gravel, or even frozen runways accept a larger aircraft for passenger and cargo service, notably in places such as Alaska and northern Canada. As remote communities increasingly paved runways, demand fell, and Boeing did not continue the option beyond the -200 variant. Today, landing on unpaved surfaces still requires modifications for safety, but the original kit is no longer sold for modern 737s.