GAC Engineering Drawing GC51 5010326, Rev. A - Cabin Audio of which are DER approved by Peter Jobe . AR-E-1063 on FAA 8100-9 form dated 01122/2010. Modified Cabin Drnvash and Downwash Lighting In accordance with GAC Engineering Drawing GC5810316. Rev. A - Cabin Effect Lights of which are DER approved by Peter Jobe , AR