| Code 0 | System flown with a known discrepancy no additional discrepancies noted. System can be used. |
| Code 1 | System used and performed satisfactorily. No maintenance required. |
| Code 2 | System used and performed satisfactorily. A minormal function exists but system is capable of further mission assignment. |
| Code 3 | System performance was unsatisfactory. This system did not cause an abort. |
| Code 4 | System performance was unsatisfactory. This system caused or contributed to an abort. |
| Code 5 | System out of commission prior to takeoff. |
| Code 6 | System installed but not used. |
| Code 7 | System not installed. |
| Code 8 | Aircraft or system has suspected or known radiological/biologicalcontamination. |