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It looks like in your illustration that there IS chipping damage where the wings & tail impacted. Keep in mind that the building was heavy concrete and planes, especial the tail & wings, are made of lightweight materials. Most of the mass of a plane is in the fuselaugh, and all the weight impacting in a 12-15' (or whatever) area was enough to punch a hole in the building.
This contrasts with the WTC impacts. The outer walls of the WTC towers were mostly glass and light framwork to stableize the floors. The wight-bearing structure was all near the middle of the towers. That's why the towers had plane-shaped holes in them.
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