Originally Posted by
b1lanc
Impacting all aircraft, most frequently seen 25R Hong Kong. Reproduced in an engineering simulator and will be fixed in FCM blockpoint 5.1
Most airliners have a Rockwell Collins GLU-920/925 MMR installed as the ILS receiver, some part number differences exist to provide GLS RNP(AR) ADS-B etc.
It is only seems to be one brand of aircraft with one brand of MMR that seems to be impacted, some customers have opted for a different MMR like the Honeywell RMA-55 or the Thales TLS-755.
Others may have a Collins GLU-920/925 installed in a different manufacturers aircraft. They are not impacted.
The issue seems to be with the aircraft manufacturers specific autopilot gains and how it processes the LOC output from the MMR. If the PFD is showing the aircraft passing through the LOC with the LOC captured one has to ask what the autopilot is actually capturing, it is not capturing what is on the PFD.