The FAA Aircraft Dispatcher knowledge test (test code ADX) has one number to hit. Here it is, with the retest rule, from the FAA's testing matrix and Part 65.
70% passes. On the 80-question ADX test, that's 56 right.
The ADX test is 80 questions in 3.5 hours, and the matrix lists a minimum age of 21 to take it. No instructor endorsement is needed for the first try. The FAA may add unscored validation questions on top of the scored ones; they don't count for or against you, and the allotted time already covers them.
Checked October 24, 2026 against the official sources listed at the bottom of this page.
Take the free Aircraft Dispatcher practice test80 questions at the real pass mark, no sign-upYou leave the test center with your Airman Knowledge Test Report (AKTR). It shows your score and a code for every question you missed. Keep the original: the examiner can ask about them on the practical test.
Wait 30 days, or skip the wait with a signed statement from someone who holds the certificate and rating you're after, saying they gave you more instruction in each subject you failed and consider you ready (14 CFR 65.19). Either way, bring the failed AKTR to the test center.
70%. The ADX test is 80 questions in 3.5 hours, so 56 correct passes.
30 days, unless you bring a signed statement from an airman holding the certificate and rating you want, saying they gave you more instruction in each failed subject (14 CFR 65.19).
No. The testing matrix says no instructor endorsement or other written authorization is required for an initial attempt.