scope:

This standard establishes uniform criteria for conducting trade studies to determine the optimal design for an on-aircraft fault diagnosis/isolation system, hereafter referred to as the On-Board Built-In Test System (OBBIT).

This standard is applicable to Department of Defense procurements which include the development of on-aircraft fault diagnosis/isolation systems where a selection can be made between such alternatives as central computer controlled on-board centrally polled built-in test equipment (BITE), decentralized BITE, detached Aerospace Ground Equipment (AGE), etc., or combinations of the preceding. The fault diagnosis/isolation systems of interest are those used to diagnose/isolate faults at the flight line (organizational) level of maintenance.