This composite of images released by the National Transportation Safety Board (NTSB) shows Air Canada flight 759 (ACA 759) attempting to land at the San Francisco International Airport in San Francisco on July 7, bottom. At top is a map of the runway created from Harris Symphony OpsVue radar track data analysis. At center is from a transmission to air traffic control from a United Airlines airplane on the taxiway. The bottom image was taken from San Francisco International Airport video and annotated by source. (NTSB via AP)
File - In this undated file photo, provided by the National Transportation Safety Board, the wreckage of a sightseeing plane that crashed in remote, mountainous terrain about 25 miles from Ketchikan in southeast Alaska on Thursday, June 25, 2015, killing the pilot and eight passengers. The NTSB on Tuesday, April 25, 2017, said the pilot's decision to fly using visual flight rules when conditions called for instrument rules was a cause of a fatal crash of the sightseeing flight. (National Transportation Safety Board via AP, File)
FILE - In this undated photo provided by the National Transportation Safety Board, investigators work near the wreckage of a sightseeing plane that crashed, Thursday, June 25, 2015, in remote, mountainous terrain near Ketchikan in southeast Alaska, killing the pilot and eight passengers. The NTSB on Tuesday, April 25, 2017, said the pilot's decision to fly using visual flight rules when conditions called for instrument rules was a cause of a fatal crash of the sightseeing flight. (National Transportation Safety Board via AP, File)
FILE- In this June 9, 2016 file photo, mangled bicycles are tagged as evidence at the Michigan State Police crime lab in Kalamazoo, Mich. The National Transportation Safety Board says better communication between police agencies might have prevented the deaths of five bicyclists last year in southwestern Michigan. A pickup truck plowed into cyclists on a rural road near Kalamazoo last June. The NTSB says 22 minutes passed between the first 911 call about an erratic driver and the crash. The board says Charles Pickett Jr. might have been stopped if dispatchers for three police agencies had shared more information. (Mark Bugnaski/Kalamazoo Gazette-MLive Media Group via AP)
This image released by the NTSB on Dec. 13, 2016, indicates the location of the El Faro on Oct. 1, 2015, at about 2 a.m., and the path of Hurricane Joaquin. The El Faro sank Oct. 1, 2015, and all 33 crew members perished in the accident. (National Transportation Safety Board via AP)
In this image made from a video released by the National Transportation Safety Board on April 26, 2016 shows the top of El Faro navigation bridge structure with missing voyage data recorder, mast and support structures at the bottom of the Atlantic Ocean in the Bahamas. Amid howling winds, blinding squalls and massive waves, the freighter El Faro and its crew struggled for survival, unaware that their course was taking them directly into the path of Hurricane Joaquin. All 33 crew members were killed. (National Transportation Safety Board via AP)
FILE - This undated image made from a video released April 26, 2016, by the National Transportation Safety Board shows the stern of the sunken ship El Faro. Amid howling winds, blinding squalls and massive waves, the freighter El Faro and its crew struggled for survival _ unaware that their course was taking them directly into the path of Hurricane Joaquin. All 33 crew members were killed. (National Transportation Safety Board via AP, File)
FILE- This undated file image made from a video by the National Transportation Safety Board shows the stern of the sunken ship El Faro. The former chief engineer of the container ship that sank in a hurricane killing 33 sailors said Wednesday, Feb. 8, 2017, that evidence from the ship's "black box" shows a crew working hard to keep it afloat. (National Transportation Safety Board via AP, File)
In this photo provided by the National Transportation Safety Board via the Florida Highway Patrol shows a Tesla Model S that was being driven by Joshua Brown, who was killed when the Tesla sedan crashed while in self-driving mode on May 7, 2016. A source tells The Associated Press that U.S. safety regulators are ending an investigation into a fatal crash involving electric car maker Tesla Motors' Autopilot system without a recall. (NTSB via Florida Highway Patrol via AP, File)
FILE - This Oct. 1, 2016, file photo provided by the National Transportation Safety Board shows damage from a Sept. 29, 2016, commuter train crash that killed a woman and injured more than 100 people at the Hoboken Terminal in Hoboken, N.J. The deadly crash remains under investigation but questions have been raised about what role the lack of an automatic train control system, the engineer’s undiagnosed sleep apnea, and a bumping post that was more than 100 years old played in the accident. (Chris O'Neil/National Transportation Safety Board via AP, File)
FILE – This Oct. 1, 2016, file photo provided by the National Transportation Safety Board shows damage from a Sept. 29, 2016, commuter train crash that killed a woman and injured more than 100 people at the Hoboken Terminal in Hoboken, N.J. The track was equipped with a rusting steel-and-concrete barrier, called a bumper or bumping post, installed about 110 years ago. In contrast, Atlantic City Terminal is configured with newer bumping posts that use hydraulics for more shock absorption. (Chris O'Neil/National Transportation Safety Board via AP, File)
FILE - This Oct. 1, 2016, file photo provided by the National Transportation Safety Board shows damage done to the Hoboken Terminal in Hoboken, N.J., after the Sept. 29 commuter train crash. Lawmakers investigating New Jersey Transit are expected to focus on the role modern safety technology could have played in preventing last month's deadly crash. Friday's hearing on Oct. 21, 2016, in Trenton comes after an Associated Press report found that NJ Transit had more accidents and paid more safety fines than any other commuter railroad since 2011. (Chris O'Neil/NTSB photo via AP, File)
FILE - This Oct. 1, 2016, file photo provided by the National Transportation Safety Board shows damage done to the Hoboken Terminal in Hoboken, N.J., after a commuter train crash that killed one person and injured more than 100 others. New Jersey legislators will consider granting themselves subpoena power as they begin to look into last month's New Jersey Transit train crash. The Democrat-led Assembly Judiciary Committee is expected to consider subpoena authorization on Thursday, Oct. 20, 2016. (Chris O'Neil/NTSB photo via AP, File)
In this Sunday, June 1, 2014, photo provided by the National Transportation Safety Board, shows NTSB investigators at the scene of a plane that plunged down an embankment and erupted in flames during a takeoff attempt Saturday night at Hanscom Field in Bedford, Mass. The co-owner of the Philadelphia Inquirer newspaper, Lewis Katz, was killed along with six other people in the crash just days after reaching a deal that many hoped would end months of infighting at the newspaper and help restore it to its former glory. (AP Photo/National Transportation Safety Board)
FILE - In this Jan. 24, 2014 photo, National Transportation Safety Board's Joseph Kolly, holds a fire-damaged battery casing from the Japan Airlines Boeing 787 Dreamliner that caught fire at Logan International Airport in Boston, at the NTSB laboratory in Washington. The FAA failed to properly test the Boeing 787’s lithium-ion batteries and relied too much on Boeing for technical expertise, a new report from the National Transportation Safety Board says Thursday, May 22, 2014. (AP Photo/Manuel Balce Ceneta, File)