( CNN ) -- An electrical fire on board a Boeing Dreamliner caused the plane to lose primary electrical power during a test flight Tuesday , the company said . The crew relied upon backup systems to land the aircraft . `` The pilots executed a safe landing and at all times had positive control of the airplane and all of the information necessary to perform that safe landing , '' Boeing spokeswoman Lori Gunter said Wednesday . Boeing is analyzing flight data from the plane , a process it says will take several days , to determine the exact cause of the fire . The company 's initial inspection of the aircraft indicated damage to a power control panel in the rear of the aircraft . Boeing employees were conducting a test of a system designed to prevent fires when smoke began filling the back of the cabin of the next-generation 787 Dreamliner , according to the company . The crew was testing a `` nitrogen generation system , '' which separates nitrogen from ambient air and pumps it into fuel tanks as jet fuel is burned during a flight , Boeing said . The system is designed to prevent oxygen from filling the empty space and potentially igniting the fuel . There is no indication , however , that Tuesday 's fire was caused by the nitrogen generation system , according to Boeing spokesman Jim Proulx . Boeing is grounding its entire fleet of test Dreamliners pending results of its analysis of hundreds of different data measurements to determine the cause of the fire . The Dreamliner departed from Yuma , Arizona . After about six hours of flight , smoke entered the cabin as the plane was on approach to Laredo , Texas . `` It 's something that needs to be taken very seriously , '' said Proulx . `` We need to know what happened before we can determine the likelihood of its repeatability . '' The 42 people aboard evacuated using the plane 's emergency slides , Federal Aviation Administration spokeswoman Lynn Lunsford said . One person was injured during the evacuation . `` We are continuing to gather data regarding this event , '' Gunter said in a statement . `` It 's too early to tell what may have gone wrong . '' The plane is the second of six test Dreamliners , having undergone 179 flights and 558 hours of flight , according to Boeing data posted on its website . The company does not intend to sell the test plane to any airline customers . Boeing says it still intends to deliver the first 787-08 Dreamliner to ANA Airlines in the middle of the first quarter of next year . ANA has 55 Dreamliners on order , which Boeing plans to deliver over the course of several years . The Dreamliner is Boeing 's new passenger jet , touted as a highly fuel-efficient aircraft made largely with composite materials . It made its maiden flight in December 2009 after two years of delays , but the head of Boeing 's commercial aircraft division told CNN in July that the Dreamliner could still make its debut in early 2011 . The company has nearly 900 orders for the jet around the world . Aviation experts say Boeing 's testing problems are not indicative of the Dreamliner 's ultimate safety . `` If I were a prospective passenger in a 787 I would n't be concerned , '' said Snorri Gudmundsson , assistant professor of aerospace engineering at Embry-Riddle Aeronautical University . `` All these bugs will be weeded out . '' `` Boeing is quite thorough , not just because of requirements from the FAA but because of Boeing 's position in the industry , '' added Todd Curtis , a former Boeing electrical engineer . CNN 's Frances Causey and Jason Kessler contributed to this report .
NEW : An electrical fire cause the plane to lose power , Boeing says . NEW : The crew relied on backup systems to land the aircraft . Comment: Boeing says no new flights will be scheduled for now .