ospace Systems, Inc. Engineering Report 1-52 dated 1/18/89, entitled "SUBSTANTIATiON - RH FWD AVIONICS RACK". This report has been FAA approved. by Robert E. Poteet, FAA Structures DER //NM-494, with FAA Forth 8110-3 dated 12/05/91. The effects to he aircraft's basic weight and balance has no! changed as a res