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Nothing new re the specific failure I reported a week or so ago, but some
thoughts on the subject.
Seems that there are at least two other similar failures noted. That
seem to indicate a generic problem.
The GM3 linkage has self aligninig bearings at each end. The inclination
is to install that linkage with the landing gear DOWN. No problem there.
But - - with the LG retracted. there can be a consequential problem if
the two ends of the GM3 linkage are not co-planar, or nearly so. With
the linkage folded nearly double on itself, the two bearings have very
little "wiggle room" to self align. If they are not nearly co-planar,
there could be significant forces generated to force the pressed-in
bearing out of the inboard GM3.
Just a theory. <Dick Alden> N425A LNC2/320
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