Diagnostic | Duration | Frequency | Description | |||
---|---|---|---|---|---|---|
Level 5 | 0.3/2.5sec | Daily and in Crisis Situations | Automated general self diagnostic | |||
Level 4 | 3.75/30sec | Suspected fault missed by level 5 | Automated thorough self diagnostic | |||
Level 3 | 1.25/10min | Key systems need thorough check | Crew monitor self diagnostic and check key systems | |||
Level 2 | 1-2 hours | Severe problem where system can not be taken off line | Crew inspect most aspects of system by hand to augment automated diagnostic | |||
Level 1 | 2+ Hours | Thorough manual overhaul. Complete failure of system | System taken off line. Crew inspect every aspect of system |