There is a problem regarding the flight plan page in the FMC in the ATR 72 aircraft, which happens sometimes when switching plan pages or editing the plan enroute. The MCDU gets stuck in temporary FP mode and cannot be changed. E.g. Flight from EGHI to EGJB. When I want to edit the FP route page (or enter a secondary flight plan) randomly, the flight plan goes yellow and you cannot go back to the active flight plan. You are stuck in the temporary data plan, neitither CLR TMPY or Execute fuction, or trying to change any other FP parameters. You remain stuck in the Yellow plan. I eventually had to manually land the aircraft. It should be able to switch between a temporary and active plan, Execute or CLR TMPY should work.
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Well, there is at least three more users reporting this issue (ATR flight plan page gone yellow), and so I don’t think it is user error and think this may be a bug, and its not in the existing bug list, so refering it back to users does not help. I will try and recreate. Meanwhile anyone else experienced FMS issues in this aircraft?