(NEWSER– The continuing investigation into the crash of an Asiana Airlines plane still hasn't spotted any mechanical trouble—meaning it's likely that pilot mistakes were to blame for the disaster, Sky News reports. National Transportation Safety Board chair Deborah Hersman offered new information about investigators' findings, with concern centered on how pilots could have failed to notice their slow speed during landing, the AP reports.

  • Pilots said they believed the plane's "autothrottle" was controlling its speed, but while the device was "armed," it appears to have been set to idle.
  • When the plane's altitude was 500 feet, its airspeed was 134 knots—below the target of 137. A warning sounded; pilots recognized that they weren't aligned with the runway and tried to fix the problem.

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