A method for testing the functionality of an electronic flight bag (EFB) has been developed. First a communication link is established between the EFB and a central maintenance computer (CMC). Next, a power loss presence test is initiated for the EFB. This test determines if critical applications of the EFB are recovered during a restart after a power loss. If the EFB fails the test, a failure message is transmitted to the CMC. Next, a communication bus test is initiated for the EFB. The communication bus test determines if adequate communication links exist between the EFB and a data source for critical applications. If the EFB fails the test, a failure message is transmitted to the CMC.