I'm sorry if this has been asked before - I did do a search to see if it was, and found nothing - but its been driving me nuts!I fly the PMDG7474-400 into Frankfurt quie a lot. I have the latest Navigraph airac on board and I checked the correct frequency for the ILS for Runway 07L at Frankfurt on the ** website. The ILS frequency for 07L is 110.10. When I select the ILS for 07L the FMC selects this frequency 110.10, but when I fly through the localiser and hitt the APP button - I get NAV INVALID on the FMC and the aircraft flies through the localiser and captures neither the localiser or glideslope. I have no idea why this is happening - but if anyone can explain it to me - and put me out of my misery - I would be most gratefulThanksPaulBAW1065

I'm sorry if this has been asked before - I did do a search to see if it was, and found nothing - but its been driving me nuts!I fly the PMDG7474-400 into Frankfurt quie a lot. I have the latest Navigraph airac on board and I checked the correct frequency for the ILS for Runway 07L at Frankfurt on the ** website. The ILS frequency for 07L is 110.10. When I select the ILS for 07L the FMC selects this frequency 110.10, but when I fly through the localiser and hitt the APP button - I get NAV INVALID on the FMC and the aircraft flies through the localiser and captures neither the localiser or glideslope. I have no idea why this is happening - but if anyone can explain it to me - and put me out of my misery - I would be most gratefulThanksPaulBAW1065

Hi Paul,I don't personally know. You might want to try asking the PMDG forum; they're a couple up from this one.Cheers,

Hi Paul,I don't personally know. You might want to try asking the PMDG forum; they're a couple up from this one.Cheers,

Bryan. OK. Will do. Wasn't sure if it was a FS9 or a PMDG issue - so tried here first. Thanks