Documents from the National Transportation Safety Board (NTSB) indicate the pilot of the helicopter that crashed in January, killing nine people including NBA legend Kobe Bryant, may have become disoriented in foggy conditions.
Zobayan told air traffic control moments before the tragic accident that the helicopter was climbing, while it was actually descending, the NTSB documents indicate.
In adverse weather conditions, when a pilot is unable to use external visual cues and with insufficient attention to the helicopter’s instruments, he or she may become disoriented in a condition knows as “somatogravic illusion.”
“Without outside references or attention to the helicopter’s attitude display, the actual pitch and bank angles have the potential to be misperceived,” Moler wrote.
“Additional sensory inputs, such as visual cues, are needed to correctly perceive attitude and acceleration. When a pilot misperceives attitude and acceleration it is known as the ’somatogravic illusion' and can cause spatial disorientation,” she noted.
Although the helicopter’s accelerations were not recorded since the aircraft did not have a data recorder, Moler indicated that “[c]alculated apparent angles at this time show that the pilot could have misperceived both pitch and roll angles.”
Toxicology tests performed by a forensic laboratory did not indicate the presence of alcohol and drugs in liver and muscle samples from the pilot.
A note in the medical and pathological information section of one of the reports stated that “[i]nsufficient blood specimen for analysis of carboxyhemoglobin was noted,” which is a test that would indicate the presence of carbon monoxide poisoning.
In a news release, NTSB said that no conclusions about how or why the crash occurred should be drawn from the information in the docket, which “does not provide the final report, nor does it contain analysis, findings, recommendations, or probable cause determinations.”
Nine people died in the crash, including Bryant’s 13-year-old daughter.