On July 25, 1984, 46-year-old Gerald Dalrymple was a passenger on a chartered Cessna 401B, tail number N7984Q, that left Anchorage for Cantwell, Alaska. Also aboard were Jack Dickey, Donald Gabbert, Gordon Newstrom, John Murphy and pilot Keith Newstrom. The flight was a company VFR departure at 7:31 AM after a 7:04 AM briefing had indicated Cantwell was under instrument flight rules.

After takeoff there were no further communications and no distress signal. Extensive searches, including hundreds of Civil Air Patrol missions covering more than 50,000 square miles, found no trace. The official search was suspended in August 1984 and the NTSB classified the occurrence as a missing aircraft with no determined cause. The pilot’s father and the employer continued efforts afterward, and a reward was offered for information.

What information might help locate the aircraft or explain what happened that morning?