[hharney]

Posted for a friend at AirScan


Looking for any help at all on this gear issue.

Having a problem with gear extension on 932AS/SN 01879

Right gear locks down fine. Left occasionally is struck by downlock and prevented from full extension as the top of the strut is rising. The right gear gets fully retracted (observed on very slo-mo video) before the downlock engages. On the left side, as soon as the pin (chromed ball) on the overcenter arm is struck by the top end of the strut moving upward, and the downlock is released by the rotation of that arm, the downlock moves rearward, preventing the final movement of the gear to the full down position.
We have changed the downlocks. Left to right—same problem.
It is as though the right side remains passive until the gear is full up, while the left downlocks wants to engage immediately and forcefully once the arm rotates to release the small pin it’s been holding.
Both downlocks are hydraulically “T”’d together. Pressure SHOULD be the same in both. Snubber control was in earlier models (through 01671) on the respective main gear actuators. 01672 and after in the Pwr Pak, but there’s only a single hyd line to both gear actuators (T’d together) and both downlocks, (T’s together.)
Five of us working the problem are each struggling. There must be an Occam’s Razor simple solution. Help!!
Five us us have ben turning pages and scratching heads for over a week. Time and again we’ll get 20 perfect downlock sequences, then next day a series of failures. Hand pumping and Pwr Pak both.
Ideas?