Squeak HH did the same to me. It was on a Sundowner and had a part failure that caused loss of plane. The sent the part that failed (and a note not to use as the manuel pic shows and says)but would and will not replace the plane. I have ragged about it on the forums alot and sent probabaly 10 -15 e-mails to HH about the part. It was a part that had to be installed on the motor to keep everything in cowl. After my prediciment and others they started sending a note in the part bag stating not to be used as previously said. And says to use a different muffler. Thing is the muffler they recommend to use now does not fit the part. This was a big deal for me, as i lost a 80" Sundowner because of a part they knew would and was failing. If not then they would not have started sending out the note with this part. But still recommend this part to be used and now it won't fit the muffler they are NOW recommending. The stock muffler you just are supposed to throw away i guess. This is how HH has become. Them not honoring there b/o products is no surprise to me. And man i had also sent them E-Mails about how good there customer service had been. You just never know.