The president and CEO of Plymouth-based Minntech Corp. remained in critical but stable condition Monday after his private plane crashed on Saturday.

Pilot Roy Malkin, 65, and a passenger sustained serious injuries when the single-engine experimental plane crashed at Crystal Airport.

Malkin remains at North Memorial Medical Center in Robbinsdale, where he underwent surgery Sunday evening.

As Malkin recuperates, Minntech executive vice president Paul Helms will oversee day-to-day operations at the company, which makes disinfection and reprocessing systems for endoscopy and renal dialysis. Minntech was purchased by New Jersey-based Cantel Medical Corp. in 2001.

According to a statement released by Malkin's family, division heads at Minntech will report to Andrew Krakauer, president and CEO of Cantel Medical. The Malkin family declined further comment.

Federal Aviation Administration records indicate that the plane is registered to Malkin. It crashed at the end of a runway after failing to gain altitude on takeoff, according to the FAA, which did not release the name of the passenger.