Tweak Maintenance costs DC8

[MikeS]

For the sake of playability and realism, would be nice if someone could go through maintenance cost specs of the DC8

IN GW3, for example: A 14 year old DC8-72, costs over $2.5 million in C-Check and over $14 million in D-check. The upcoming D-Check is only
the second one in it's operational life.
(While an 18 year old A300 in same tech condition (73%) costs $1.6 Million C, and $8.8 Million D-check)

The DC8 is a nice aircraft in AWS as it is available in pax, combi and freight versions plus upgradable to super 70 series.

   Generally:
   D-checks costs in real life are around 70% manpower and 30% parts. A typical D-Check needs around 30.000 man hours as a crude estimate. That would
   equal to $3 Million if we set the man hour at $100 as an example. Plus parts, we would be at around $4.3 Million total.
   Obviously these figures vary from type to type and are overly simplistic but the point is they would never be anything near the AWS figures.
   Unless one would want to figure in cabin refurbishment with IFE systems, but that isn't really modeled in AWS and would increase cost for all models.