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I had a similar problem.  My left main was chipping a spot on the left main gear door. Retraction tests showed there was an inch of clearance up on jacks, but the chipped gear door matched where the brake assembley passed by.  You could envision how the door could be flexed into the brake assembley.  By building up the gear leg skid ramp on the gear door higher along the area where the brake assembley came near the door it solved the problem.  I also reasoned that the air loads on the main gear door would explain why the problem doesn't show up on the jacks.  The lesson for  anyone not yet flying is to provide plenty of clearance during the construction phase.  John Wright Colorado Springs

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Please send your photos and drawings to marvkaye@olsusa.com.