 After performing a show at Kezar Stadium in San Francisco in 1973, Led Zeppelin encountered bad turbulence on a flight back to Los Angeles.As a result, the band's manager Peter Grant resolved to hire "The Starship" for the remainder of the tour, at a cost of $30,000.The aircraft was the same type as used by commercial airlines, but its owners allowed it to be specifically modified to suit the whim of their clients.