◆ SpookStack

It is obvious from the response-mode definitions in Appendix A that none of the described vehicle failures can be considered as a Mode 1, 2, or 3 response, or a Mode-4 on-trajectory failure.• Except possibly for (2), it also seems apparent that none can be modeled as either a rapid tumble or a slow tum. • Although prompt destruct action during any of the described flights might have resulted in a Mode-4 classification, the safety officer typically needs several seconds to evaluate data after a malfunction. Quick action is contrary to safety philosophy if impact limit lines are not threatened and the destruct • system is not at risk, since additional flight time enhances the user's opportunity to pinpoint the nature of the problem. 9/10/96 5 RTI