Originally Posted by
PerfInit
Definitely an Airworthiness related question, better suited for a current & qualified A&P /IA or FSDO Airworthiness Inspector with expertise in that area... Have you asked your mechanic? How about the local FSDO? I would not attempt to "interpret" the STC without seeking professional advice.
I have contacted the FSDO and was told I would have to gather substantiating data to start the field approval process for the deviation. However, that was before I discovered that there are no wingtips available for the late models (and even the M/N models unless you get a Sportsmans STOL kit).