https://www.faasafety.gov/SPANS/event_details.aspx?eid=124379
"This program is indented to help owners and operators of vintage aircraft (certificated before Jan 1, 1980, fixed wing, unpressurized, under 12,5000 lbs with a reciprocating engine) find and use replacement parts or processes, when the parts are no longer available, obsolete and out of production.
"This program is indented to help owners and operators of vintage aircraft (certificated before Jan 1, 1980, fixed wing, unpressurized, under 12,5000 lbs with a reciprocating engine) find and use replacement parts or processes, when the parts are no longer available, obsolete and out of production.