... The fuel charts used for the study made allowance for a higher consumption rate than the standard DC-9-30 series aircraft. This was the result of a fuel audit by the Douglas Aircraft Company on ONA aircraft and was due to jet assisted takeoff fairings installed on those aircraft. [Pages 7-8 of the paper report; pages 12-13 of the PDF file of the report. ONA = Overseas National Airways, who operated the flight on behalf of ALM. Emphasis added.]
Did these DC-9s ever actually use RATO during revenue operations?
EDIT: "Revenue operations" here means "any flight conducted for monetary compensation".