DENVER , Colorado ( CNN ) -- Early indications show no problems with the landing gear , tires or brakes on the Continental Airlines jet that veered off a runway at Denver International Airport in Colorado , despite earlier reports . The wreckage of the Continental Airlines plane sits in a ravine December 22 in Denver , Colorado . `` There 's no indication from the physical examination on the scene of brake problems at this time , '' said Robert Sumwalt , a National Transportation Safety Board member leading the investigation team . Saturday 's accident injured more than three dozen people , including the captain who piloted the plane . Sumwalt said preliminary evidence indicated no problems with the Boeing 737 's landing gear , tires or engines before the jet ran off the runway into a 40-foot-deep ravine during its take-off roll . Earlier Monday , a source with knowledge of the investigation told CNN that early indications suggested that a problem with the landing gear , tire or brakes may have caused the accident . The source said the problem could have caused a wheel to lock up or some other situation that would have made the plane veer off as it headed down the runway . Watch what NTSB official has to say about flight recorders » . `` The brakes showed no leaks , no locked brakes , '' Sumwalt told reporters late Monday , adding that the brake pads `` looked good . '' He said tire marks indicate that all four main landing gear were inflated . The weather was clear , and no obstacles were on the runway , he said . The accident injured 38 people , most from bruises and broken bones as frightened passengers tried to flee a fire that broke out on board Flight 1404 . No fatalities were reported . Sumwalt said the captain , an 11-year veteran of Continental , was injured in the accident and `` not physically able '' to be interviewed yet . But an investigator interviewed the first officer , who told them that the initial take-off roll and taxi was normal . The the co-pilot `` noticed a deviation from the center line of the runway and a sudden left turn , '' Sumwalt said . An off-duty crew that flew the aircraft into Denver before the Saturday flight to Houston was also on board . The first officer from that crew said there was `` absolutely no problem with the aircraft '' during the previous flight . Sumwalt said the cockpit voice recorder `` shows nothing out of the ordinary '' during the preflight operations . He said the recording revealed that 41 seconds after the brakes were released , there were sounds of bumping and rattling . Four seconds later , a crew member called for a rejected takeoff . Flight 1404 was taking off about 6:18 p.m. Sumwalt said the plane reached a maximum speed of 119 knots ( 137 mph ) before going into the ravine . Passengers on Sunday described the chaos inside the plane after the plane came to rest . Watch survivor describe crash on blog » . `` Some people were trying to get luggage from the top , the engine was on fire so I was worried , you know , about getting out of there , '' said Gabriel Trejos . `` And then we had another guy yelling , 'Oh the plane 's gon na blow up ! The plane 's gon na explode ! ' `` Another passenger , Jeb Tilly , described the experience as `` incredibly violent . '' Watch first responders on the scene » . Trejos , who was traveling with his wife and baby , told CNN he sensed something was wrong with the plane before it took off . `` I heard something over the intercom before , you know , that they were having engine problems and shortly after that they said that everything 's fine ... there 's going to be an on-time flight . '' Continental spokeswoman Julie King , however , told CNN that she was unaware of any announcement of engine problems on board the flight . Sumwalt agreed , saying , `` I do n't have any information , no one has come to us that they knew of a problem '' before the accident .
NTSB says early evidence does not point to tires , brakes or landing gear . Earlier report from CNN source suggested a potential problem . Captain was injured in accident and has n't been interviewed yet . Jet veered off runway into a 40-foot-deep ravine during its takeoff in Denver Saturday .