San Francisco Jet Crash: Pilot Error 'Likely' A picture of the charred cabin of the plane that crashed at San Francisco airport has been released, as experts say evidence points towards pilot error. The image, posted on Twitter by the National Transportation Safety Board (NTSB), shows the burnt-out interior of the Boeing 777, which crashed on Saturday killing two people. Investigators have now said that no evidence of mechanical problems has been found, putting the focus of the investigation on to the pilots. In her final briefing before the agency concluded its on-site detective work, NTSB Chairman Deborah Hersman said Asiana Flight 214 demonstrated no signs of a breakdown, while voice recordings showed the pilots had failed to notice that their approach was dangerously low and slow until it was too late. She said: "There is no mention of speed until about nine seconds before impact, when they're at 100 feet (30 metres)." The NTSB also posted a picture of the debris left by the crash Just seconds before impact, two of the pilots call for the landing to be aborted. Investigators have stressed that nothing has been definitively ruled out and no firm conclusions reached. The agency's final evaluation is expected to take more than a year. The jet itself, though heavily damaged, had no malfunctions in any critical systems, including the engines and flight-control surfaces, the autopilot, the autothrottles and the flight director, Ms Hersman said. Two Chinese students were killed and 180 of the 307 people on board were hurt when the airliner slammed into a seawall at the end of the runway. The impact ripped off the back of the plane, tossed out three flight attendants and scattered pieces of the jet across the runway as it spun and skidded to a stop. The battered passengers, some with broken bones, were told over the plane's public address system to stay in their seats for another 90 seconds while the cockpit consulted with the control tower, a safety procedure to prevent people from evacuating into life-threatening fires or machinery. Authorities are investigating whether one of the two teens who died may have been run over by a fire engine rushing to the burning aircraft. Investigators study the wreckage The Federal Aviation Administration has found "no significant issues" during 134 unannounced mechanical, pilot or avionic checks on Asiana airliners over the last 18 months, Ms Hersman said. She has said that pilots Lee Gang-kuk, who was landing the jet for his first time at the San Francisco airport, and Lee Jeong-Min, who was training him, were ultimately responsible for a safe landing. While the pilots were manually flying the jet for the landing, as expected on a clear, sunny day, they told investigators they thought the airliner's speed was being controlled by an autothrottle set for 157mph (252kph). Inspectors found that the autothrottle had been "armed," or made ready for activation, Ms Hersman said. But investigators are still determining whether it had been engaged. In the last two minutes, there was a lot of use of autopilot and autothrottle, and investigators are going to look into whether pilots made the appropriate commands and if they knew what they were doing, she added. During the evacuation, many passengers jumped out the back of the plane or slid down inflated slides through emergency exits. Then, said some, an unnerving wait began. Emergency phone tapes recorded frantic callers, pleading for help. An aerial view of Asiana Airlines Flight 214 "We've been on the ground, I don't know, 20 minutes, a half hour," said one woman. There are people laying on the tarmac with critical injuries, head injuries. We're almost losing a woman here. We're trying to keep her alive. San Francisco Fire Department spokeswoman Mindy Talmadge said some passengers may not have immediately seen ambulances at the scene because they were dispatched to a nearby staging area, as first responders assessed who needed to be taken to the hospital. "You don't cause more chaos in an already chaotic situation," Ms Talmadge said. You don't do that with 50 ambulances running around all over the place. Within 18 minutes of receiving word of the crash, five ambulances and more than a dozen other rescue vehicles were at the scene or en route, and airport fire crews and crews from other agencies were already on the scene, she said. "Our response was immediate," Ms Talmadge added. It's not what you may see in the movies. That's not how a real-life response is to a large-scale incident.