It looks like a branch or rock damage. Is it on the front side of the A/C? If so then it might have just been from a road hazard.
If the roof underneath is solid and dry then I'd patch and seal it. If not then removal of A/C is in order to see how bad the damage is.
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2017 Eagle HT 29.5BHOK (sold)
2017 Ford Powerstroke 6.7, Crew, 4x4 (sold)
2018 Toyota Highlander
Maggie, Old English Sheepdog
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