T7 CTD on RNP approaches

[raddragon 3]

I have had a CTD 4 times while attempting to complete the RNP approached into NZAA. Are there any know issues with RNP approaches with the t7?

[777simmer 117]

no problems here. Have not tried NZAA though.

 

Have you tried it somewhere else?

[Vic1 3]

hi

could you explain exactly what you were doing each time when the ctd occurred because I have had similar experiences with other approaches such as selecting a runway and or sid and still being in an offset things like that?

 

 

 

 

 

 

tks

 

 

kav

[raddragon 3]

I have just spent the last couple of hours playing around. Looks as though it may have something to do with the RNP ARC's. I replicated the crashes on the NZAA Yankee approaches, but couldn't replicate the crash on the RNP X-Ray approaches.

 

The difference seems to be the T7 adds a waypoint (cannot remember the name) to ensure the X-Ray approaches hold the ARC 5.6 DME from the AA VOR.

 

The Yankee approaches however, do not insert this "additional waypoint" and CTD while attempting to fly the ARC.

 

I am not an expert, but is the addition of such a waypoint normal T7 behaviour to be able to fly and ARC?

[downscc 1,327]

The aircraft is not adding waypoints, those are always defined by the sidstar file and I have seen many RNP approach arcs done incorrectly by Navigraph. Haven't checked this cycle but last cycle I found several by using the PLN mode on the ND and stepping through the flight plan before flying it. However, this problem should not cause a CTD. I flew a incorrectly coded RNP into KRNO where I discovered the problem but without a CTD.

[raddragon 3]

The aircraft is not adding waypoints, those are always defined by the sidstar file and I have seen many RNP approach arcs done incorrectly by Navigraph. Haven't checked this cycle but last cycle I found several by using the PLN mode on the ND and stepping through the flight plan before flying it. However, this problem should not cause a CTD. I flew a incorrectly coded RNP into KRNO where I discovered the problem but without a CTD.

 

Ok, thanks for the info. Back to the drawing board.