The Venezuelan charter airline Venezolana currently has the oldest commercially operational passenger 737-200.

This is where a gravel kit comes in. Originally designed ... Originally manufactured for the first generation of the famed 737 (i.e. the 100 and 200 models), Boeing declined to outfit its newer ...

"The Boeing 737-200 is the best aircraft for gravel runways, so for us, changing to another type of aircraft wasn't the answer. The cost of switching would have been prohibitive for our customers.