CL 605 Air mode issue
Hello, I’m a pilot on the CL 605, I’m wondering if any other pilots are facing an issue with the FMC CDU. This issue has been happening consistently. First flight of the day on start up. On the Pos init page I will be able to input the airport ref coordinate on the CDU 2. However after the first landing and setting up for the second flight the CDU 2 will not allow to key in the airport ref. Upon further inspection. I realised on the Per menu flight Log page. The aircraft has not landed (Air mode). However this does not happen with the CDU 1. We have check with engineering for a possible WOW sensor problem. But it doesn’t seem to be the issue. We are currently engaged with CRC and Collins, and after further discussion with them. They are quite puzzled with our issue. We have sent the plane over to BAss Singapore. They found no issue with out plane. We even did a FMS swap on No 2. Does anyone know what could be the problem?