The plane landed safely at Fresno-Yosemite Airport just before 10 a.m. There were 54 people onboard United Express flight 5584, including the 3 crew members. No one was injured.
FAA spokesperson Ian Gregor said the pressurization problem did not cause the oxygen masks on the CRJ-200 airplane to be used. A SkyWest Airlines representative said the pilot reported the problem after taking off from LAX. The pilot descended to a lower altitude as a precaution.
All of the passengers were put on another SkyWest plane and continued to Boise.
The plane was being flown for United Express. SkyWest mechanics at FYI were trying to determine what caused the pressurization problem.