Formerly known as OEA Aerospace (OEAA), this facility is located on 550 acres in the Potrero Hills above Fairfield, California overlooking Travis Air Force Base. Propulsion Systems' Fairfield facility is Aircraft Interior Products center of excellence for linear explosive product. The facility is 177,000 square feet and employs 180 people. Some of the product lines supported include Linear Shaped Charge (LSC), Shielded Mild Detonating Cord (SMDC), Thin Layer Explosive (TLX) and Thermally Initiated Venting Systems (TIVS).

Fairfield is also an ISO 9001-2000/AS9100(B) certified facility.