Each shuttle was designed to fly 100 missions, so its based on times flown not time in service.
This was Columbia's 28th flight.
R I P
2000 Honda Civic Si (EBP)
DC lowering springs
DC front upper strut bar
Thermal R&D catback exhaust system
Carbon Fiber Dashboard
AEM V2 CAI
*1999 Ford Contour(blue) sold!!!