[plane41]

With the ac on jacks, main gear doors disconnected and held up with bungee cords. Jack the wheels up while a person watches the main gear strut from behind the ac under aft engine looking forward. . Just when the main gear struts engage the up locks and the up locks are engaged. at this point your doors would normally close and the handle would return to neutral. But if the struts lift off the up locks, this opens the gear door close circuit with is also connected via the hyd pack to the handle return. The question is how much does the strut lift up. Just a little, its a good bet the problem is your up locks. If its a lot, say 1/2 inch, then its a bigger problem. in the gear down position, check each strut for proper seating in saddle. (see rigging and adjusting main gear). Make sure you also check the ac frame where the strut hits when in the up position. Any bends(even minor) allow the strut to lift pass the unlocks.