Last November, an engine was removed from another airplane (and was) put through some degree of maintenance at Delta. This had to do with an oil leak on the front bearing, which is at the very front end of the engine.  -   George Black     Quotes
Last November, an engine was removed from another airplane (and was) put through some degree of maintenance at Delta. This had to do with an oil leak on the front bearing, which is at the very front end of the engine. George Black
 Airplane And Aviation