| Mitchell Model AK630 | Century I Autopilot | Century Flight Systems Inc | | 22 | Flight Controls | PMA |
| Mitchell Model AK632 | Century II B Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK633 | Century I Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK634/FD | Century IV Autopilot or Century IV Flight Director Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK635 | Century III Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK636 | Century IIB Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK637 | Command Electric Trim System | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK638 | Piper Altimatic IIIC Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK639 | Piper Autocontrol IIIB Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK640 | Piper Autoflite II Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK641 and AK641FD | Century IV Autopilot and Century IV Flight Director Autopilot | Century Flight Systems Inc | | 22 | Flight Controls | PMA |
| Mitchell Model AK642 | Century III | Century Flight Systems Inc | | 22 | Flight Controls | PMA |
| Mitchell Model AK643 | Century IIB | Century Flight Systems Inc | | 22 | Flight Controls | PMA |
| Mitchell Model AK644 | Century I | Century Flight Systems Inc | | 22 | Flight Controls | PMA |
| Mitchell Model AK645 | Century I Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK646 | Century II B Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK647 | Century III Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK649 | Century I Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK650 | Century III Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK651 | Century II B Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK652 | Century III Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK653 | Century IIB Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK654 | Century I Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK656 | Century I Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK657 | Century IIB Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK658 | Century III Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK659 | Century I Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK660 | Century IIB Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK661 | Century III Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK662 or AK662FD | Century IV Autopilot or Century IV Flight Director Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK662/FD | Century IV Autopilot or Century IV Flight Director Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK663 | Command Electric Trim System | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK665 | Century I Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK666 | Century IIB Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK667 | Century III Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK668 or AK668FD | Century IV Autopilot or Century IV Flight Director Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK668/FD | Century IV Autopilot or Century IV Flight Director Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK669 | Command Electric Trim System | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK671 | Century I Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK672 | Century IIB Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK673 | Century III Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK674 or AK674FD | Century IV Autopilot or Century IV Flight Director Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK675 | Command Electric Trim System | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK677 | Piper Altimatic IIIC Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK678 | Command Electric Trim System | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK679 | Century III Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK684 or AK684FD | Piper Altimatic X Autopilot or Piper Altimatic X Flight Director Autopilot | Century Flight Systems Inc | | 22 | Flight Controls | PMA |
| Mitchell Model AK684/FD | Century IV Autopilot or Century IV Flight Director Autopilot | Century Flight Systems Inc | | 22 | Flight Controls | PMA |
| Mitchell Model AK685 or AK685FD | Piper Altimatic X Autopilot or Piper Altimatic X Flight Director Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |
| Mitchell Model AK685/FD | Century IV Autopilot or Century IV Flight Director Autopilot | Century Flight Systems Inc | — | 22 | Flight Controls | PMA |