A federal bankruptcy judge has agreed to let the federal government take over the Philadelphia Orchestra’s pension plans, saying the orchestra was unlikely to survive if it tried to keep running them itself. The two pension plans, one for musicians and the other for staff members, cover about 200 people. Some musicians are likely to have their pensions reduced after the takeover. Although the government’s Pension Benefit Guaranty Corporation insures defined-benefit pensions, its insurance is limited. In the past symphony orchestras competed for and retained top talent by promising generous pensions, so musicians with many years in the Philadelphia Orchestra probably have earned benefits above the insurance limit. The orchestra, which filed for Chapter 11 bankruptcy protection in April, had asked for the government’s help with its pensions, saying that it could not raise money if donors thought their dollars might end up in a troubled pension fund. The pension funds are set up in a way that makes the orchestra bear all the investment risk. When the orchestra emerges from bankruptcy its musicians and staff members will have retirement plans under which they bear the investment risk.