Re: Engine Changes
We would usually do an engine change on 747 or 767 in a 12 hr shift and leave the run for the oncoming shift. sometimes takes longer if there is problems. That includes inhibiting the old engine,changing IDG,Hyd pump and nose cowl. Thats with a crew of 6 or 7 and an overhead crane. A bit slower with a mobile crane or bootstrap.
Could be done quicker but there is no incentive so why "bust a gut"