The airplane, US registration no. N46597, serial no. 17257374, is a Cessna 172K, produced in 1969/1970, and costing $12,500 to $13,995 when new. This particular aircraft was removed from the FAA's US Registry and was exported to South Africa on December 12, 1975. As of 2018, she was in service in that country with the Central Flying Academy (CFA) and registered as ZS-JUO. The registration no. N46597 was later issued to a Buckeye Dream Machine, serial no. 3393, which is a powered parachute. (In online records, Buckeye is often misspelled Buckey.) This aircraft registration was canceled on October 12, 2011. There is no recent information about that aircraft. As of 2020, the US registration number N46597 is not being used.
TJ, in this instance, refers to Tijuana.
Muscatel is a variety of white wine made from muscat grapes.
Mule refers to someone who transports illegal goods, usually knowingly and usually across the border.