The Boeing 737 has been in service for 57 years, and in that time, Boeing has attached the larger CFM International CFM56 engine and ... The original Boeing 737-100 and 737-200 variants were ...

when its GE contract for the CFM56-7B engines powering its Boeing 737-700s expired. The airline took on “engine level management of that fleet” primarily driven by its fleet renewal and planned ...