Many of the "-220" engines on Block 25 and later aircraft were upgraded from 1997 onwards to the "-220E" standard, which enhanced reliability and maintainability; unscheduled engine removals were reduced by 35%.
Mange af "-220" motorerne på Block 25 og senere fly blev fra 1997 opgraderet til "-220E" standarden, som forbedrede pålideligheden og vedligeholdelsen; antallet af ikke-planlagte motorskift blev reduceret med 35%.