Dominique Weinstein:
March 12, 1977; south of Syracuse, New York
9:05 PM. The pilot and first officer of an United Airlines DC-10 observed a round bright white object. The object had strong effects on the autopilot and the three compasses. (Reference:  UNIDENTIFIED AERIAL PHENOMENA EIGHTY YEARS OF PILOT SIGHTINGS Catalog of Military, Airline, Private Pilots Sightings from 1916 to 2000 Dominique F. Weinstein)

Richard Haines:
In this instance two gyro-compasses and the standby magnetic compass each were affected and displayed different readings. I provided Eric (Herr) with details on the 12 March 1977  in-flight incident.  I have partially documented this interesting compass deviation case on a DC-10 airplane in:  Sturrock, P.A. (Ed.),  Physical Evidence Related to UFO Reports: The Proceedings of a Workshop Held at the Pocantico Conference Center, Tarrytown, New York, September 29 - October 4, 1997, Journal of Scientific Exploration. Vol. 12, No. 2, 1998. (Pp. 197-199) Sturrock, P.,  The UFO Enigma, Warner Books, NY,1999  (Chpt. 12)