The FAA said airlines must demonstrate battery safety before flights could resume, a statement that effectively meant airlines had to ground their 787s.
The statement said it would also resume talks with the de Chastelain decommissioning body when it was satisfied the peace process would be advanced by these discussions.
"Johnny feels confident that once the Parkinson's is medically stabilized, he can resume his normal work schedule, " Cash's manager, Lou Robin, said through the statement.
He was responding to a statement by Kingfisher Chairman Vijay Mallya last week that the carrier has submitted a plan to the government to resume flying.