iranu
"Historically LPC blades have been labelled with the fan being number 1. Not sure if that's the case with modern high bypass ratio engines, but it makes sense."
Correct - I asked the FAA earlier today and this was the response:
"1st-stage LPC compressor blade" is what P&W uses to refer to their fan blade. I am required to use the nomenclature P&W uses in their engine manual (EM) and service bulletins (SB) for all ADs that are written. This is mainly because the maintenance personnel will use the EM and SB to accomplish the AD. Using fan blade in the AD would cause confusion.