The Philadelphia Orchestra Association wasted no time between voting for bankruptcy and executing the actual filing. The orchestra's lawyers filed 1,704 pages of documentation Saturday, according to the database of the U.S. Bankruptcy Court, Eastern District of Pennsylvania (Philadelphia).
The filing covers the Philadelphia Orchestra, the Academy of Music and the Philly Pops. I haven't had a chance to read the entire filing, but it appears to cover matters such as asking the court's permission to continue paying insurance, utilities, relationships with critical contractors, etc., and outlining administrative procedures.
It is Bankruptcy Petition #11-13098-elf.