This standard specifies the general requirements for calibration and compensation of magnetic compasses on aircraft. This standard is applicable to the precise heading calibration of direct-reading magnetic compasses, distant-reading magnetic compasses, precision distant-reading magnetic compasses and gyromagnetic compasses installed on military fighters, attack aircraft, bombers, transport aircraft and helicopters. Civilian aircraft can also be used as a reference.
HB 6627-1992 history
1992HB 6627-1992 General requirements for aircraft magnetic compass calibration