SF85 (your security form for terminal) asks:
"In the last 7 years, have you, or a company over which you exercised some control, filed for bankruptcy, been declared bankrupt, been subject to a tax lien, or had legal judgment rendered against you for a debt? If you answered "Yes," provide date of initial action and other information requested below.
Are you now over 180 days delinquent on any loan or financial obligation? Include loans or obligations funded or guaranteed by the Federal Government. "
Should be fine if your credit problems are in the past.
I don't know about terminal, but enroute have to fill out SF86 which asks:
a: In the last 7 years, have you been over 180 days delinquent on any debt(s)?
b: Are you currently over 90 days delinquent on any debt(s)?