Bootstrap 1,
That's what I also heard. If the parts become available the ground time needs to be also there and then we need at least 2 crews for, as I am told, about 24 hours to do each aircraft.
Still, it was eventually done and they got away with it. Think of the hours saved on the a/c packs coz they weren't fitted - a big saving of component hours. My friends used to tear their hair out, now they just shrug.