| 250-B17F/2 | Rolls-Royce Engine | O&N Aircraft Modifications Inc | — | 72 | Engine / APU | PMA |
| 3400115-13 | Valve Assy (LH) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400115-14 | Valve Assy (RH) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400115-19 | Valve Assy (LH) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400115-20 | Valve Assy (RH) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400120-1 | Powerplant Installation Left Engine | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400120-2 | Powerplant Installation Right Engine | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400121-1 | Vacuum System Installation (Left Engine) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400121-2 | Vacuum System Installation (Right Engine) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400121-3 | Vacuum System Installation (Vacuum Sensor) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400122-1 | Engine Mount Struts Installation (Left Wing) | O&N Aircraft Modifications Inc | — | 57 | Structures | PMA |
| 3400122-2 | Engine Mount Struts Installation (Right Wing) | O&N Aircraft Modifications Inc | — | 57 | Structures | PMA |
| 3400124-1 | Strut Assy (LH) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400124-10 | Mounting Block (RH) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400124-2 | Strut Assy (RH) | O&N Aircraft Modifications Inc | — | 32 | Landing Gear | PMA |
| 3400124-7 | Mounting Plate (LH) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400124-8 | Mounting Plate (RH) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400124-9 | Mounting Block (LH) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-1 | Tube Assy | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-12 | Tube Assy | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-13 | Hose | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-14 | Hose | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-15 | Hose | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-16 | Hose | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-17 | Tube | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-2 | Tube Assy | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-22 | Hose | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-25 | Modified Fitting | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-27 | Manifold | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-28 | Bracket | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-29 | Modified Fitting | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-30 | Tube Assy | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-6 | Tube Assy | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400125-8 | Tube Assy | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400126-1 | Down Pipe Assy (Left Side) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400126-2 | Down Pipe Assy (Right Side) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400126-3 | Tail Pipe Assy | O&N Aircraft Modifications Inc | — | 78 | Engine Accessories | PMA |
| 3400127-1 | Engine Mount Assy | O&N Aircraft Modifications Inc | — | 71 | Engine Accessories | PMA |
| 3400128-10 | Tube Mod (RE) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400128-11 | Tube Mod (LE) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400128-12 | Hose | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400128-13 | Hose | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400128-15 | Tube Assy | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400128-5 | Hose (LE) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400128-6 | Hose (RE) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400128-7 | Hose (LE) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400128-8 | Hose (RE) | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400128-9 | Hose | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400129-1 | Front Engine Rail Bracket Assy | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |
| 3400129-3 | Bracket Assy | O&N Aircraft Modifications Inc | — | 20 | unknown | PMA |