2017 Thor Motor Coach Palazzo

I am reporting a serious and repeated safety defect involving Hehr side windows installed on my 2018 Thor Palazzo 36.1 motorhome (VIN: [XXX] ). Multiple operable side windows on this RV have experienced adhesive bond failure between the scissor arm/operator mechanism and the vent glass pane. This has caused windows to partially detach and violently flap while driving at highway speeds. One rear bathroom window completely detached and flew off the RV during highway travel in 2022. Additional adhesive failures have continued occurring from 2023 through 2025 involving: - Kitchen window - Living room window - Dinette window - Rear bathroom window (including replacement assembly) In several incidents, I was forced to pull onto the highway shoulder to perform emergency temporary repairs using tape and adhesive to prevent windows from fully detaching from the vehicle. In December 2025, while driving near [XXX] , the rear bathroom vent window again separated from the operator arm while traveling at highway speed despite prior repair work. The window was violently flapping in the wind and appeared at risk of completely detaching from the RV. This defect creates a serious road hazard because detached glass/window components could strike nearby vehicles or motorists. I am aware of prior Hehr/Lippert recalls involving adhesive-related window failures, but I have not found a recall covering this specific failure point involving separation between the operator arm and vent glass. The defect appears widespread across multiple windows on the RV and has persisted despite repeated repair attempts. I believe this issue warrants investigation and possible expansion of existing Hehr/Lippert window recalls. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

WHEN PARKED IN A PARKING LOT AFTER A 1HR DRIVE, THE ONLY EXIT DOOR THE VEHICLE HAS DID NOT OPEN, PREVENTING US FROM EXITING THE VEHICLE. OTHER CAMPERS PARKED IN THE SAME LOT WERE UNABLE TO OPEN THE DOOR FORM THE OUTSIDE BUT ABLE TO HAND ME TOOLS TO TAKE THE LOCK APART FROM THE INSIDE AND OPEN THE DOOR USING PLIERS AND A SCREW DRIVER. THE DOOR LATCH MADE OF A ZINC OR SIMILAR DIE CASTING HAND BROKEN IN HALF PREVENTING THE RETRACTION OF THE LATCH AND KEEPING THE DOOR LATCHED.

WHILE DRIVING THE RV, THE WINDOW ABOVE THE SINK SEPARATED. THE WINDOW IS DOUBLE PANED. THE OUTER GLASS PULLED AWAY AND WAS FLAPPING, CAUSING THE INTERIOR GLASS TO ALSO START PULLING AWAY. WE WERE ON A STRETCH OF HIGHWAY THAT WAS BUSY WITH TRUCKS, APPROX 6:30PM (DARK), 2 LANES EASTBOUND I-40 IN CALIFORNIA. THERE WERE NO EXITS FOR 20-25 MILES AFTER THE INCIDENT BEGAN. THE WINDOW CONTINUED TO BANG AND PULL AWAY THE ENTIRE DRIVE. THE PULL FROM THE WIND THREATENED TO COMPLETELY SEPARATE THE WINDOW ASSEMBLY FROM THE RV. THE HIGHWAY SHOULDER WAS NARROW WITH A DROP OFF SO WE DID NOT PULL OVER AS THIS WOULD ALSO NOT BE A SAFE SOLUTION.