When flying a Standard Instrument Departure (SID) or a missed approach procedure that contains an altitude leg (climb to, proceed to altitude X, turn X when altitude Y has been reached, etc) followed by direct-to-fix (DF; proceed to waypoint XYZ) leg, the FMS could incorrectly sequence this direct-to fix leg once the altitude is achieved. If the direct-to-fix has a specified turn direction, and requires an approximately 180 degree course reversal, the FMS may not turn in the specified direction.
The FMS software has an anomaly that when the altitude leg is sequenced and the next DF leg is sequenced, the turn bit is lost and the FMS calculates a turn independent of the published procedure. This will be corrected in future FMS software loads.
Honeywell SIL D201212000036 has been released to document this issue. A decision on a database mitigation has not been made, but once complete, the SIL will be updated appropriately.