The airline has said that key performance tests were undertaken in the two-hour test flight which took-off from the Auckland International Airport. A biofuel blend of 50:50 jatropha and Jet A1 fuel was used to power one of the Air New Zealand Boeing 747-400's Rolls-Royce RB211 engines. The test flight is a joint initiative between Air New Zealand, Boeing, Rolls-Royce and Honeywell subsidiary UOP, with support from Terasol Energy. Tests were reportedly completed at various altitudes and under a variety of operating conditions to measure the biofuel's performance through the engine and fuel system.