Sandstrom then kept it a one-goal game at 11:25 when he made a save on a one-timer by Necas from the left circle on a power play.
It was Sandstrom's first start since Feb. 12.
"I missed the release on [the goal] but after that, I just tried to see the puck as well as possible," Sandstrom said. "I've been waiting for my opportunity again to play, so I'm very happy to be out there."
Kochetkov preserved Carolina's lead with a stick save on Joel Farabee at 8:01 of the second period. After Owen Tippett intercepted a back pass by Necas intended for Jordan Martinook in the slot, he passed up to Farabee, who tried to go five-hole on the breakaway.
"You can see [Kochetkov's] just so calm and confident in himself," Svechnikov said. "I guess he just knew what he was going to do. That's awesome."
It was Kochetkov's first win since Dec. 20. He was 0-3-1 in his past four starts.
"We love him around here. He's a great kid," Pesce said. "He competes his tail off, which we love. I'm just glad he came up and found his rhythm."
Forward Tyson Foerster, who was selected by Philadelphia in the first round (No. 23) of the 2020 NHL Draft, made his NHL debut after he was promoted from Lehigh Valley of the American Hockey League on an emergency basis earlier Thursday. He had two shots on goal and three blocked shots, including blocking a Svechnikov shot attempt at an open net from the right circle at 15:28.
"I was just trying to do whatever I can to help the team win," Foerster said. "They move the puck around really well, so every time they try to throw it to the net, you've got to help the goalie out. He played great tonight."
NOTES:The Flyers have scored two goals or fewer in 11 of their past 14 games. ... The Hurricanes are 24-for-24 on the penalty kill in their past nine games. ... Philadelphia defenseman Tony DeAngelo served the first of his two-game suspension for spearing Tampa Bay Lightning forward Corey Perry on Tuesday. … Burns has 51 points (12 goals, 39 assists) in 62 games this season, tying DeAngelo (2021-22) for the most points in a single season since the franchise moved to Carolina from Hartford in 1997. … Sandstrom is 0-6-1 in his past seven starts. He has not won since Nov. 18.