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HiFly

After SP1 still not flying holds correctly

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First two holds I tried, one on approach reversal and the other on the miss procedure were entered and flown very precisely.  On my second flight started from an already aloft situtation file to the same airport.  On the approach reversal hold (teardrop entry) FMC flew only a 10 degree intercept angle and then turned way into the non holding side.  I manually caught the error and corrected it.  Then when reaching the Miss Approach hold which was also a teardrop, the FMC turned the wrong way toward the non holding side.  I captured the intial turn and have attached it to this post.  You can clearly see the correct holding depiction on the ND but as you can see the aircraft is banking in the opposite direction on entry.  I left it alone and it continued to turn to the right a full 90 degrees and then continued flying straight without attempting to turn back toward the hold!   This was what was happening on the RTM before SP1.  Not always but often enough that you can't trust the fmc and have to be ready to hand-fly.  Also attempting to adjust FMC after a miss seems to sometimes result in a freeze just like before SP1.

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Resurrecting an old thread here, but I am seeing a very similar problem with holding. It seems like the airplane has issues flying a parallel entry. The teardrop and direct entries seem to work OK, but the parallel entry is not so good.While designing RNAV procedures for PAPG, I had an overfly fix right before the holding pattern. The airplane flew over the fix and then turned away from the hold fix. It then turned on the non-protected side and seemed lost. I later modified the flight and changed the fix right before the hold to remove the OVERFLIGHT flag and make it a "fly by" waypoint. This helped and the airplane then flew the hold better.

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