CHARLOTTE, N.C. -- Television evangelist Rex Humbard testified this week that he once hitched a ride on a private jet with PTL executives, but did not know the trip was charged to David Taggart's personal credit card. Humbard, a former PTL board member, said he did not know why Taggart charged the $3,899 flight, which included a $200 tip, on his personal card and then sought reimbursement from PTL. The August 1985 flight was from Charlotte to Florida. David Taggart and his brother, James, are charged with failing to pay $487,000 in income taxes from 1984 to 1987. Federal prosecutors say the brothers, both former PTL officials, diverted $1.1 million of ministry funds to their personal use by taking cash advances on PTL credit cards and using blank ministry checks to pay the credit card bills. Humbard, who said his ministry staff includes 15 family members, testified that he does not allow any expenditures over $10,000 that have not been approved by the board of directors. On Tuesday, a former PTL financial officer testified that he did not think he would get help from ministry founder Jim Bakker in getting documentation explaining $200,000 in cash advances to David Taggart. Peter Bailey, the ministry's former vice president for finance, said David Taggart refused to submit documentation for the cash advances despite repeated requests. Bailey said PTL eventually had to write off the $215,578 in outstanding cash advances that David Taggart had accumulated by November 1985. The brothers were indicted in December, the day that PTL founder Bakker and his former top assistant Richard Dortch were indicted on mail and wire fraud charges. Bakker and Dortch face trial Aug. 28. "It was not uncommon for him to request a $10,000 cash advance" without any accounting that the money was spent on PTL business, Bailey said. Bailey testified that the only control he had over Taggart's use of ministry credit cards was the $100,000 credit limit imposed by MasterCard and Visa. He also testified he once pledged a $75,000 certificate of deposit owned by PTL as collateral for a loan Taggart needed to buy a $640,000 apartment in New York's Trump Tower. Taggart at the time was a vice president and was paid about $90,000, prosecutors said. Bailey also testified that three blank checks, later filled in for a total of $140,000, were issued to David Taggart shortly before Bakker's resignation in March 1987. He said the checks were used by the Taggarts to pay off their personal American Express bills. Witnesses have testified that besides the New York apartment, the brothers owned a $330,000 home in Charlotte and regularly purchased hundreds of thousands of dollars' worth of jewelry and designer clothes. Merchants from New York City offered evidence of luxury purchases by the Taggarts, including an order for suits totaling $10,460; $35,000 in furs over a span of several years, and an $8,775 purchase of alligator-skin shoes.