Straight out of the earnings report for power Passing the blame on Covid 19. Covid just moved the inevitable to the front lines. Many layoffs coming like 225-250 out of Schenectady.
Gas power equipment revenue was up double digits on higher shipments. We shipped 25 gas turbine units, including five HA and 10 aeroderivative this quarter. Gas power service revenue was down double digits. This was driven by the outage shifts and weaker commercial conversion in transactional and upgrades.
While approximately 20% of our first half planned outages were rescheduled, gas power still performed outages in 31 countries, return commission projects adding 4.3 gigawatts of power to the grid globally. Based on our current view, we still expect to deliver 45 to 50 heavy-duty gas turbine shipments in 2020 and execute 95% of the outages that were planned for the year. Power portfolio revenue was down double digits. We think about this as three businesses.
Steam, approximately 25% of our first half planned outages shifted to the second half. All but 5% of those outages are rescheduled. Power conversion continues to show underlying sequential operational improvement. And nuclear, largely a regulated service business, remains stable.
Segment margin of negative 1.3% contracted 390 bps organically primarily due to the decline in our highly profitable service volume and some charges. This include approximately 100 million related to an underperforming joint venture for global aeroderivative packaging and 50 million quality reserve on a power conversion product line that we have exited. We continue to take cost actions across power, which includes roughly 800 headcount reductions in this quarter. Gas power had a positive operating profit this quarter, with fixed costs down 13% year over year.