BK117 Uncommanded Pitch Up
Had a BK 'moment' the other night....
During a fully coupled ILS approach, practice for currency under VFR conditions otherwise would have been even more disconcerting...
Tracking down the ILS nicely until we go over the Outer Marker, as soon as we get the lights and audio we get a 10-15 degree pitch up, we decoupled the AP after it showed no signs of trying to regain glideslope after a couple hundred feet....
Spoke to another operator and they had the same thing in their BK, but not their B412....
There is a radio mast just left of track, possible signal interference....???
Thoughts....