|
| Phase | Step | CDLG | CULG | AUL | ADL | AOD | ACD | CDL | CUL | COD | CCD |
|
| Gear down | Gear is up, panel commands neutral | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| Initialize gear down. Command gear down from panel, doors distributor switched to open | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
| Doors are opening | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| Doors complete opened, initiate legs down | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 |
| Legs are getting down, doors command remains on open | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 |
| Legs complete down, initiate closing doors | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 1 |
| Doors are closing, legs command remains on legs down | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 |
| Doors complete closed, legs command remains on down until panel command gets on neutral. Doors command remains on close | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 1 |
| Gear down, panel command gets on neutral, doors and legs commands get on neutral | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
| Gear up | Initiate gear down. Command to open doors. | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
| Doors are opening | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
| Doors complete open, command legs up | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 |
| Legs are getting up, doors command remains on open | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 |
| Legs complete up, command to close doors | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 |
| Doors are closing, legs command remains on up. | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
| Doors complete closed, legs complete up but panel command is not yet on neutral. Doors command remains on closed, legs command remains on up. | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| Landing gear complete up, panel command gets on neutral. | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| Phase | | CDLG | CULG | AUL | ADL | AOD | ACD | CDL | CUL | COD | CCD |
|
