More likely the intgernals were damaged, Either the blower or the fan (Thankfully two of the lowest cost "internals" and easiest to replace)
Short story: Neighbor here at Cathead Creek was up working on his Carrier Air V (Air Conditioner) Same symptom, bad rattle.. I helped him remove the inner covers (I had two of 'em stil have one) and he quickly found the blower hub was cracked and allowing it to rattle.. Late Friday, RV stores closed save for CW and that's a hundred mile hike. Where is he going to find a replacement?
My basement. You see I had two, and when the other one was replaced (The one I no longer have) I scrapped out a few parts. That was one of 'em
Home is where I park it!