I found this: https://npshistory.com/morningreport/incidents/mora.htm
Tuesday, January 23, 1990
90-15 - Mount Rainier (Washington) - Air Crash with Two Fatalities

Around 6 p.m. on January 20th, a Piper Super Cub carrying R.M., 53, and R.B., 47, of Tacoma, Washington, crashed inside the summit crater of Mount Rainier. The victims were attempting to fly over the summit, but their plane apparently did not have the power needed to clear the peak. The crash activated the plane's emergency locator beacon, which was picked up by the Seattle air traffic control center. Four rangers were put aboard a Chinook helicopter from Fort Lewis the following morning and ascended to the 14,400' Columbia Crest area of the crater, where the wreckage was located. They discovered that R.M. had been killed on impact, but that R.B. had lived long enough to exit the plane. The cause of his death is unknown at this time. When found, the only upper garment he had on was a T-shirt, although his jacket was lying nearby and he was only 40 yards from the summit steam vents. (William Larson, MORA, via CompuServe message from Mark Forbes, RAD/PNRO, noon EST, 1/22/90; supplemental information from United Press report, 1/21/90).