Jay,

I experienced the same problem when I had adjusted the outer door attached to the landing gear too tight.  What was happening was the gear would retract and activate the sequence valve, but the outer door would add some pull down force on the gear because it was adjusted too tight.  As the hydraulic pressure dropped due to the opening of the sequence valve, the outer door would pull the strut down just a bit, thus closing the sequence valve.  Once the sequence valve was closed hydraulic pressure was shut off to the inner gear door stopping its motion and the gear strut would retract.  As the gear pulled up tight the sequence valve would open, starting the cycle all over again.

The symptom is that the inner gear door closes with a jerky motion.  By lengthening the outer gear door links just a bit, the problem went away.

Jim Thomas

Legacy with 300 hours