Partners and Programs:
  • BARS
  • SKYbrary
  • ASN
  • Contact Us
  • Members' Center
  • Login
  • Support Aviation Safety

FSF-80th-Logo_500px

  • Industry Updates
  • The Foundation
    • About the Foundation
    • 80 Years of Global Aviation Safety Leadership
    • Asia Pacific Centre for Aviation Safety
    • Founders
    • Mission
    • History
    • Leadership
    • Officers and Staff
    • Media/Communications
    • Aviation Award & Scholarship Programs
    • Work with Us
    • Join Us
  • AeroSafety World
  • Events
  • Toolkits & Resources
    • Mental Health and Wellness
    • Global Action Plan for the Prevention of Runway Incursions (GAPPRI)
    • COVID-19 Crisis Resources
    • Fatigue Management
    • Flight Path Monitoring
    • Global Action Plan for the Prevention of Runway Excursions (GAPPRE)
    • Go-Around Project
    • Global Safety Assessment Project
    • Learning From All Operations
    • Past Safety Initiatives
    • Pilot Training and Competency
    • Special Reports
    • ASN Accident Dashboards
    • ASN Accident Data
    • Videos
  • Industry Updates
  • The Foundation
    • About the Foundation
    • 80 Years of Global Aviation Safety Leadership
    • Asia Pacific Centre for Aviation Safety
    • Founders
    • Mission
    • History
    • Leadership
    • Officers and Staff
    • Media/Communications
    • Aviation Award & Scholarship Programs
    • Work with Us
    • Join Us
  • AeroSafety World
  • Events
  • Toolkits & Resources
    • Mental Health and Wellness
    • Global Action Plan for the Prevention of Runway Incursions (GAPPRI)
    • COVID-19 Crisis Resources
    • Fatigue Management
    • Flight Path Monitoring
    • Global Action Plan for the Prevention of Runway Excursions (GAPPRE)
    • Go-Around Project
    • Global Safety Assessment Project
    • Learning From All Operations
    • Past Safety Initiatives
    • Pilot Training and Competency
    • Special Reports
    • ASN Accident Dashboards
    • ASN Accident Data
    • Videos
  • Contact Us
  • Members' Center
  • Login
  • Support Aviation Safety
Partners and Programs:
  • BARS
  • SKYbrary
  • ASN

FLIGHT SAFETY FOUNDATION HEADQUARTERS

701 N. Fairfax Street, Suite 250,
Alexandria, Virginia 22314

Phone: +1 703 739 6700 Fax: +1 703 739 6708

  • Aviation Safety Experts
  • Industry Updates
  • U.K. AAIB Faults Commander, Operator for Late Incident Report

News, Accident Investigation

U.K. AAIB Faults Commander, Operator for Late Incident Report

Flight data that could have aided investigation was lost because of reporting delay.

by FSF Editorial Staff | September 21, 2017

The U.K. Air Accidents Investigation Branch (AAIB) has chastised an aircraft commander, the aircraft operator and a tour group operator for failing to promptly report to the AAIB a July 21 event in which a Boeing 737 operating with a lower-than-required thrust setting struck a runway approach light during takeoff from Belfast (Northern Ireland) International Airport.

“In slightly different circumstances, this event could have resulted in the loss of the aircraft with multiple fatalities,” the AAIB said in Special Bulletin S2/2017, issued earlier this week. “The seriousness of the potential outcome, and the lack of barriers remaining to prevent it had the event escalated, persuaded the AAIB that this was a significant event requiring an in-depth investigation.”

None of the 185 passengers and crew was injured, and the only damage was to the light, the AAIB bulletin said. The aircraft operator — not named in the bulletin — reported the event to the Transportation Safety Board of Canada, and air traffic controllers filed a mandatory occurrence report and submitted information to the NATS Aeronautical Fixed Telecommunications Network.

The AAIB saw the NATS information three days after the event and subsequently began its investigation. Because of the delay, recorded data, including data from the flight data recorder and cockpit voice recorder, were unavailable to investigators.

“This has been detrimental to the investigation and may hinder the identification of all the safety issues,” the AAIB said. “It was considered necessary, therefore, to use this special bulletin to highlight reporting obligations within the U.K. for accidents and serious incidents.”

The AAIB bulletin said the 737’s flight management computer (FMC) showed an N1 of 81.5 percent was used for takeoff rather than the required setting of 93.3 percent, which was “calculated by the operator and shown on the preflight paperwork.” As a result, the thrust setting was significantly lower than required, the AAIB said.
The AAIB added that “the only credible way to achieve a grossly low N1 setting was to enter an extremely low value into the outside air temperature (OAT) field” during FMC programming.

Updated software would have identified a data entry error, the AAIB said, but the software had not been installed in the airplane.

As a result of its preliminary investigation, the AAIB issued two safety recommendations calling on the U.S. Federal Aviation Administration to require use of the updated software in 737 Next Generation airplanes and calling on Boeing to ensure that all 737 operators are aware of the information contained in the special bulletin.

Share:

Print:

Key Safety Issues

  • Controlled Flight Into Terrain (CFIT)
  • Loss of Control–In Flight (LOC-I)
  • Mechanical Issues
  • Runway Safety (approach and landing)
  • Sabotage/Intentional Acts
  • Midair Collisions (MAC)
  • Runway Safety (Conflicts)
  • Wildlife Issues
  • Fatigue
  • Cabin Safety
  • Emerging Safety Issues
    • Lithium Batteries
    • Safety Information Sharing and Protection
    • Unmanned Aircraft Systems

Related Content

Accident/Incident Investigation, Human Factors, News

An Action Slip on the Runway

A 777 copilot did not know why he unintentionally retarded the thrust levels during the…

by FSF Editorial Staff

Accident Investigation, In-depth Feature, Maintenance Matters

Uncorrected Faults

A loss of cabin pressure led to a crash that destroyed the Citation and killed…

by Linda Werfelman

Helicopter Safety, News

‘Hotspot’ Review

In the aftermath of a January midair collision at Ronald Reagan Washington National Airport, the…

by FSF Editorial Staff

Read more articles

1920 Ballenger Ave., 4th Floor, Alexandria, VA 22314

Phone: +1 703 739 6700 Fax: +1 703 739 6708

Projects & Partners

  • Basic Aviation Risk Standard
  • SKYbrary
  • Aviation Safety Network
  • Asia Pacific Centre for Aviation Safety
  • Donate
  • Advertise on our website
  • Sponsor & Exhibit at our Events
  • Work with Us
  • Contact Us
  • Site Map
  • Privacy

© 2025 Flight Safety Foundation

Join our group on LinkedIn