747-8I is 1st four engined Boeing to go through ETOPS testing

Boeing has completed certification flight testing on its 747-8 Intercontinental test fleet, setting the jumbo on a path to US Federal Aviation Administration approval later this quarter.

After flying from Barbados to Houston Intercontinental Airport, test aircraft RC003 marked the completion of its systems functionality and reliability (F&R) flight testing, the final phase of its evaluations.

RC003, painted in all-white colours for the test programme, was tasked with both F&R and Extended Operations (ETOPS) evaluations.

http://www.flightglobal.com/news/articles/boeing-completes-747-8i-certification-flight-testing-364119/