| PSC | Description
|
| 2910 | Engine Fuel System Components, Nonaircraft |
| 2915 | Engine Fuel System Components, Aircraft and Missile Prime Movers |
| 2920 | Engine Electrical System Components, Nonaircraft |
| 2925 | Engine Electrical System Components, Aircraft Prime Moving |
| 2930 | Engine Cooling System Components, Nonaircraft |
| 2935 | Engine System Cooling Components, Aircraft Prime Moving |
| 2940 | Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft |
| 2945 | Engine Air and Oil Filters, Cleaners, Aircraft Prime Moving |
| 2950 | Turbosupercharger and Components |
| 2990 | Miscellaneous Engine Accessories, Nonaircraft |
| 2995 | Miscellaneous Engine Accessories, Aircraft |