flt lvl 323 and apilot went wacko

[Guest timothyj67]

I was flying smoothly out of Tokyo and at 32300 feet my autothrottle went off and I started to descend...I have Lnav and Vnav on and ap on..I was on course and the plane didnt want to climb back to 32300 it was the 747-400 by PMDGAnyone else have Autopilot errors?

[Guest hirnwut]

Yes today!I was out of KSFO on the SHORE1.SAC SID for FL330. OPT CRZ LVL was fl327.THR REF and VNAV SPD were green. When reaching FL330 SPD & VNAV PTH became green, but the aircraft didn't stop climbing! I manually switched to V/S and brought it back to fl330 where I enganged VNAV again. From then the aircraft held the FL.Strange. Never encountered such problems before.@lex

[MELKOR 5]

Yeah, I've had the rare glitch like that. They will likely never get fixed, since there is no known repro case... :(However, in your case, the correct thing to do would be to press VNAV again - an A/T mode will be auto-selected.- Bill

[Guest s_L_Y_F_a]

yeah yeah, thats the curse of complex systems/programms, the more complex they get, the harder it becomes to explain and find problems