Petty was born October 20, 1950, in Gainesville, Florida, the first of two sons of Kitty (nee Avery), a local tax office worker, and Earl Petty, who worked in a grocery store. He had a brother, Bruce, who was seven years younger. His interest in rock and roll music began at age ten when he met Elvis Presley. In the summer of 1961, his uncle was working on the set of Presley's film Follow That Dream, in nearby Ocala, and invited Petty to watch the shoot.

In 1988, Petty joined George Harrison's group, the Traveling Wilburys, which also included Bob Dylan, Roy Orbison, and Jeff Lynne. The band's first song, "Handle with Care", was intended as a B-side of one of Harrison's singles, but was judged too good for that purpose and the group decided to record a full album, Traveling Wilburys Vol. 1. A second Wilburys album, mischievously titled Traveling Wilburys Vol. 3 and recorded without the recently deceased Orbison, followed in 1990. The album was named Vol. 3 as a response to a series of bootlegged studio sessions being sold as Travelling Wilburys Vol. 2. Petty incorporated Traveling Wilburys songs into his live shows, consistently playing "Handle with Care" in shows from 2003 to 2006, and for his 2008 tour adding "surprises" such as "End of the Line" to the set list.  In 1989, Petty released Full Moon Fever, which featured hits "I Won't Back Down", "Free Fallin'" and "Runnin' Down a Dream". It was nominally his first solo album, although several Heartbreakers and other well-known musicians participated: Mike Campbell co-produced the album with Petty and Jeff Lynne of Electric Light Orchestra, and backing musicians included Campbell, Lynne, and fellow Wilburys Roy Orbison and George Harrison (Ringo Starr appears on drums in the video for "I Won't Back Down", but they were actually performed by Phil Jones).  Petty and the Heartbreakers reformed in 1991 and released Into the Great Wide Open, which was co-produced by Lynne and included the hit singles "Learning To Fly" and "Into the Great Wide Open", the latter featuring Johnny Depp and Faye Dunaway in the music video.  Before leaving MCA Records, Petty and the Heartbreakers got together to record, live in the studio, two new songs for a Greatest Hits package: "Mary Jane's Last Dance" and Thunderclap Newman's "Something in the Air". This was Stan Lynch's last recorded performance with the Heartbreakers. Petty commented "He left right after the session without really saying goodbye." The package went on to sell over ten million copies, therefore receiving diamond certification by the RIAA.Answer this question using a quote from the following article:

When did Tom break into a solo career?