Declan

I have pasted a link to a .txt file with 8 waypoint sets. Theses are extracts from my PMDG wpNAVFIX.txt file. Each set has 3 waypoints. In each set the 1st and 3rd way-points are original to the PMDG install. The 2nd waypoint in each set was created by me by manually editing the wpNavFIX.txt file, i.e inserting a record into the text file. I include the 1st and 3rd to show that; a) the format and spacing of my entries are consistent with the originals b) that my entries have the correct record positioning based on the LAT as the original .txt file has the waypoints ordered by LAT Heres the problem. When I open up the FMC in the LEGS mode, enter a waypoint in the scratchpad and hit the LSK key the FMC recognizes 4 manually entered waypoints (DORLA, ENALO, IPSEV and SEAGL). However, when I try to enter HAMMU, CARNE, GOOSZ or JETTZ) I get a message saying "NOT IN DATABASE" Now, to confuse things even further I do this; I take the waypoint VASOX, an original PMDG entry, and rename it HAMMU but leave its original coordinates unchanged. My wpNAVFIX.txt now has 2 entries for HAMMU, one being the record I initially created, the other being the renamed VASOX entry. When I enter HAMMU in the FMC scratchpad and hit the LSK key I am presented with 2 waypoints for HAMMU, exactly as configured in the txt file. I know someone is going to suggest I update my filE using a service such as Navigraph, and I probably will. But I'm hard-headed and want to know how to do it manually. Thanks in advance for any help Declan Curran

The problem is not altitude specific, the problem appears as low as 10,000 feet using kn and at higher altitudes using MACH. This happens in normal time. I tried selecting SPD ( pressing the SPD button to engage it) but it will not turn on while the the left CMD is engaged. What is a weather engine ?

At slower speeds, say 250k or below, autopilot performs as expected. At higher cruise speeds, say 300k and above the throttles are constantlly moving up and down, the yoke back and forward and the plane is in a perpetual bobbing up and down motion If I disconnect the auto-throttle and set the throttles manually everything smooths out. a) So what am I doing wrong b) once I descend to a speed where the auto-throttle will work - how do I re-engage as part of the autopilot mode - simply flipping the auto-throttle to the on position does nothing.