◆ SpookStack

4 PT IONAL, rorw’ On Vv 9010-106-09 f J MAY 1962 EDI : GSA GEN, pee NO, 27 i) ¥ UNITED STATES GOVERNMENT Memorandum TO —: SAC, SEATTLE (164-61) (P) DATE: 12/4/71 FROM : SA THOMAS J, MANNING oe | Svus- N SUBJECT: , UNSUBS . : | | Northwest Airlines Flight 305 , Portland to Seattle 11/24/71 00: Seattle CAA ~ HIJACKING; EXTORTION redent communication from Portland py rence to an ve e transmission of emergency seneing —— ae distresss purposes which al] civilian and military aircraft erry, b6 he Portlané Division has been asked to continue contacts with National Guard bre | based at Portland International Airport where for further transmissions of this device, . Investigation at various airports throughout SW Washington have revealed from technical people familiar with this homing emergency device that frequently this device can be triggered into emitting the emergency signal upon a plane LL reaching @ dive where 5 Gs is reached, 7 - ' In ‘view of no " positive information of any type concerning the location from which this signal ws trersnitted (note two locations whdely sepearated bé were ‘mentioned a no further investigation being — BIC conducted ‘by Longview RA. . z (2) TIM/ : 4 | — Yee 8l- 826 DB Cooper-3621