. 727-31 ,. Registration N505C, Serial #20115 owned by Northwest_ Holding COrporation,Foulkstohe Plaza, Suite 102, 1409 Foulk Road, P.O. Box 7138, Wiliiiington,Delaware 19803 in an experimental. flight test prograM. The flight test program is in support of the Valsan JT8D-219 Re-Engining:PrOgram TIA NM-100