Transportation Safety Board issued an investigative update, Wednesday, for
the July 7 near miss at San
Francisco International Airport.
Air Canada flight 759, an Airbus A320, was
cleared to land on runway 28R at San Francisco International Airport, but the
airplane lined up on parallel taxiway C, which had four airplanes on it
awaiting takeoff clearance. Air Canada flight 759 descended below 100 feet
above the ground and initiated a go-around after overflying the first airplane
on taxiway C.
facts are included in the investigative update:
- The captain
was the pilot flying ACA759, and the first officer was the pilot
monitoring. Both pilots held Canadian airline transport pilot
- Runway 28L was closed to accommodate construction; its
approach and runway lights were turned off, and a 20.5-ft-wide lighted
flashing X (runway closure marker) was placed at the threshold. Runway and
approach lighting for runway 28R were on and set to default settings,
which included a 2,400-foot approach lighting system, a precision approach
path indicator, touchdown zone lights (white), runway centerline lights
(white at the approach end), runway threshold lights (green), and runway
edge lights (white at the approach end).
- The incident pilots advanced the thrust levers when the
airplane was about 85 feet above ground level. Flight data recorder data
indicate the airplane was over the taxiway at this time. About 2.5 seconds
after advancing the thrust levers, the minimum altitude recorded on the
FDR was 59 feet above ground level.
- Both pilots said, in post-incident interviews, they
believed the lighted runway on their left was 28L and that they were lined
up for 28R. They also stated that they did not recall seeing aircraft on
taxiway C but that something did not look right to them.
(The top portion
of this NTSB graphic, created from Harris Symphony OpsVue radar track data
analysis, depicts the positions of aircraft on an overhead view of the runways
and taxiways at San Francisco International Airport. The text is from a
transmission to air traffic control from a United Airlines airplane on the taxiway.
The bottom photo, taken from San Francisco International Airport video, shows
Air Canada Flight 759 passing over the United Airlines airplane.)
- Automatic Terminal Information Service Q was current
and included an advisory that runway 28L was closed and that its approach
lighting system was out of service.
- Lights for taxiway C were also on and set to default
settings that included centerline lights (green) along its length. Default
settings also included edge lights (blue) and centerline lights (green)
illuminating the transition or stub taxiways from the runway to the
update does not provide probable cause for the incident and does not contain
analysis of information collected thus far in the NTSB’s ongoing investigation.
As such, no conclusions regarding the cause of the incident should be made from
this preliminary information.
The full investigative update and other
information about the incident are available online at: https://go.usa.gov/xRPFk