2007 San Francisco International Airport runway incursion

2007 San Francisco International Airport runway incursion
Incident
Date May 26, 2007 (2007-05-26)
Summary Runway incursion due to ATC error
Site San Francisco Int'l Airport
California, USA
37°37′15″N 122°22′28″W / 37.62072°N 122.37452°W / 37.62072; -122.37452Coordinates: 37°37′15″N 122°22′28″W / 37.62072°N 122.37452°W / 37.62072; -122.37452
Total injuries 0
Total survivors 27 (all)
First aircraft


An Embraer 170 Regional Jet similar to that involved in the incursion.
Type Embraer 170 Regional Jet
Operator Republic Airlines
(o/a Frontier Airlines)
Registration N872RW
Passengers 11
Crew 4
Second aircraft


An Embraer EMB 120 Brasilia turboprop aircraft involved in the incursion.
Type Embraer EMB 120 Brasilia
Operator SkyWest Airlines
(o/a United Express)
Registration N232SW
Passengers 9
Crew 3

The 2007 San Francisco International Airport runway incursion occurred around 1:36 pm PST on May 26, 2007 when SkyWest Airlines (operating as United Express) Flight 5741 (SKW5741), an Embraer EMB 120 Brasilia turboprop aircraft, nearly collided with Republic Airlines (operating as Frontier Airlines) Flight 4912, an Embraer 170 Regional Jet, at the intersection of runways 1L and 28R at San Francisco International Airport (SFO), South San Francisco, California.[1]

There were no injuries to occupants and no damage to either aircraft.[2](p6)[3] Federal Aviation Administration (FAA) officials described the runway incursion as the most serious incident of its kind in at least a decade,[4] and the National Transportation Safety Board (NTSB) carried out an investigation into the incident.[2][5][6]

Incident

Visual representation of the runway configuration at SFO. The takeoff path of the jet is shown in red, and the landing path of the turboprop is shown in blue.

The SkyWest aircraft was arriving at SFO after a flight from Modesto, California, and was cleared to land on runway 28R. At the same time, the Republic Airlines aircraft, bound for Los Angeles, California was instructed to taxi into position and hold on the intersecting runway 1L. As the landing SkyWest aircraft passed the runway threshold the Republic Airlines aircraft was cleared for takeoff.[3][2](p3) Local procedures and FAA Order 7110.65 require the local controller to wait until the landing aircraft has passed through the intersection before clearing an aircraft for takeoff on one of the intersecting runways.

Approximately 27 seconds later the Airport Movement Area Safety System (AMASS) issued an aural warning of an imminent collision, and the local controller instructed the SkyWest aircraft to stop, transmitting, "uh, sky-, skywest uhh fifty seven forty one HOLD HOLD HOLD". The SkyWest aircraft came to a stop in the intersection of runways 1L and 28R, while Republic Airlines flight lifted off and overflew it. The initial FAA tower report estimated the aircraft missed colliding by 300 feet; while the Skywest crew estimated the distance as 30 to 50 feet.[3]

Investigation

The FAA categorized the incident's severity as "Category A", the most severe;[4] Category A is defined as when "separation decreases and participants take extreme action to narrowly avoid a collision, or the event results in a collision."[7] Of the previous 15 runway incursions at SFO between 2001 and 2007, none of them were more serious than Category C,[8] defined as the situation where "separation decreases but there is ample time and distance to avoid a potential collision".[7]

Commenting on the seriousness of the incident, NTSB spokesman Ted Lopatkiewicz noted that "We investigate probably just a handful (of incursions) a year."[4] The NTSB's investigation was completed in November 2007,[2](p6) finding that the controller had failed to provide adequate separation between the two aircraft.[2](p2) FAA spokesman Ian Gregor said "This wasn't a procedural issue, this was caused by a good controller with a lot of experience making a mistake", adding that since the incursion the controller had to be recertified for their job.[4] The controller had over 20 years' experience.[9]

SFO and AMASS

Runway safety has been a priority concern for both the FAA and NTSB;[7][10][11][12] it has been on the NTSB's annual list of "Most Wanted Improvements" continuously since 1990.[13][14]

AMASS is a ground radar system that is designed to detect potential runway conflicts and alert controllers.[15] SFO was selected by the FAA for the first test installation of the AMASS system, where it became operational in June 2001, before being rolled out to 40 airports around the country.[16][15] In a scenario such as this conflict, AMASS is designed to provide an alert 15 seconds before the aircraft reach the conflict point, and the system performed as designed.[3] However, the NTSB has noted that while AMASS alerted in this incident, it did not alert in time to prevent the runway incursion.[17]

As of February 2016, the NTSB continues to list the 2007 SFO runway incursion as evidence that AMASS is insufficient to prevent runway incursions, and as a result, to list a requirement for positive ground movement control on the board's "Most Wanted Transportation Safety Improvements" list.[17]

See also

References

  1. ↑ Lee, Henry K. (June 11, 2007). "Turboprop narrowly misses hitting jet at SFO". San Francisco Chronicle. Hearst Communications Inc. Archived from the original on June 13, 2007. Retrieved July 14, 2007. Two passenger planes almost collided, missing each other by only 50 feet, at San Francisco International Airport because of a controller's mistake two weeks ago, federal investigators said today.
  2. 1 2 3 4 5 "National Transportation Safety Board Aviation Incident Final Report: incident number OPS07IA004A". National Transportation Safety Board. November 30, 2007. Retrieved August 7, 2018.
  3. 1 2 3 4 "NTSB Identification: OPS07IA004A". National Transportation Safety Board. Archived from the original on June 22, 2007. Retrieved July 14, 2007. On May 26, 2007, at 1336 Pacific daylight time, Republic Airlines flight 4912 (RPA4912), an Embraer 170 regional jet, and Skywest Airlines flight 5741 (SKW5741), an Embraer Brasilia turboprop, nearly collided in the intersection of runway 1L and runway 28R at San Francisco International Airport, San Francisco, California. Both aircraft were operating as scheduled passenger flights under 14 CFR part 121 and were operating on instrument flight plans. There were no reported injuries to occupants and no reported damage to either aircraft.
  4. 1 2 3 4 Abramson, Mark (June 30, 2007). "FAA: Runway near miss at SFO was serious". Palo Alto Daily News. Daily News Group. Archived from the original on July 3, 2007. Retrieved July 14, 2007. Federal Aviation Administration officials are calling a near-collision at San Francisco International Airport the most serious incident of its kind at the airport in at least a decade.
  5. ↑ LARAnews.net Editorial Team (June 11, 2007). "NTSB Investigating runway incursion at San Francisco". LARAnews.net. Retrieved July 13, 2007. The National Transportation Safety Board is investigating a runway incursion in San Francisco two weeks ago.
  6. ↑ "NTSB Advisory". National Transportation Safety Board. June 11, 2007. Archived from the original on June 22, 2007. Retrieved July 14, 2007. The National Transportation Safety Board is investigating a runway incursion in San Francisco two weeks ago in which two airliners may have come within 50 feet of each other on intersecting runways.
  7. 1 2 3 "Archived copy" (PDF). Archived from the original (PDF) on December 8, 2006. Retrieved July 13, 2007.
  8. ↑ Inside Bay Area – Serious runway incursions rare in area Archived September 29, 2007, at the Wayback Machine.
  9. ↑ Abramson, Mark (June 24, 2007). "Adrenaline keeps air traffic controllers flying high on the job". Palo Alto Daily News. Daily News Group. Archived from the original on July 3, 2007. Retrieved July 14, 2007. In the wake of a near-miss at San Francisco International Airport last month due to an error by an air traffic controller with two decades of experience, several local controllers shared their experiences in the field with the Daily News.
  10. ↑ FAA – Office of Runway Safety – Runway Safety Home Archived July 13, 2007, at the Wayback Machine.
  11. ↑ runway incursion
  12. ↑ http://videoontheweb.faa.gov/news/Press_Conference_on_Runway_Safety-hs.asx
  13. ↑ House Transportation and Infrastructure Committee : Press Release :: Aviation Subcommittee Holds Hearing on NTSB Safety Priorities Archived June 29, 2007, at the Wayback Machine.
  14. ↑ "NTSB – Symposia". Runway Incursion Forum: Promoting Runway Safety. National Transportation Safety Board. Retrieved July 14, 2007.
  15. 1 2 "FAA's runway safety system off track". CNN. August 13, 1999. Archived from the original on May 29, 2010. Retrieved April 22, 2010.
  16. ↑ Committee on Transportation and Infrastructure, House of Representatives
  17. 1 2 "MOST WANTED TRANSPORTATION SAFETY IMPROVEMENTS: Federal Issues, AVIATION, Improve Runway Safety". National Transportation Safety Board. Retrieved February 8, 2016.
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