On May 17, 5:52*pm, wrote:
For current AD's you can go to FAA.gov and look under the aircraft
tab. *There you will find all sorts of good info including type
certificates and AD's.

You are actually looking for the LBA 92-190-2 that mandates the
Service Life Extension inspection at 3000, 6000, 9000, and 12000
hours. The LBA mentions the Grob SB 315/45 and 315/45-2. I could find
the LBA via Google, but could not find the referenced SB on the Grob
web page.

Check with the new Grob Rep in Moriarty NM