What Is 2007 Dash 8 landing gear incidents

Overview

The year 2007 saw several high-profile incidents involving the landing gear systems of De Havilland Canada Dash 8 aircraft, particularly the Q400 variant. These events raised significant concerns about mechanical reliability, pilot training, and de-icing protocols in regional aviation operations.

Among the most notable was the crash of Colgan Air Flight 3407 on February 18, 2007, near Buffalo, New York. While not solely caused by landing gear failure, the incident involved a failure to retract the landing gear after takeoff under icing conditions, contributing to aerodynamic instability and loss of control.

• February 18, 2007: Colgan Air Flight 3407, operating a Dash 8 Q400 registered as VH-VYE, crashed during approach, killing all 49 on board and one person on the ground.
• The NTSB investigation concluded that ice accumulation on the wings and improper crew response to stall warnings were primary causes, but landing gear status played a role in flight dynamics.
• Multiple Q400 aircraft experienced landing gear malfunctions in 2007, including delayed retraction and failure to extend, prompting fleet-wide inspections by operators.
• Qantas Airways, which operated several Dash 8 Q400s at the time, reported three separate landing gear anomalies between January and March 2007, leading to internal safety reviews.
• The FAA issued Airworthiness Directive 2007-08-11 in April 2007, mandating modifications to the landing gear actuator system to prevent unintended retraction during ground operations.

How It Works

Understanding the Dash 8 Q400's landing gear system is essential to grasping the technical causes behind the 2007 incidents. The system relies on hydraulic actuation with mechanical backup, and its performance can be compromised by ice, mechanical wear, or electrical faults.

• Landing Gear Retraction: The Dash 8 Q400 uses a hydraulic system to retract the landing gear after takeoff; failure to retract can increase drag and reduce climb performance, especially in icing conditions.
• Ice Accumulation: Ice on wings or gear doors can prevent proper gear extension or retraction; in 2007, several incidents occurred during winter operations in northern U.S. and Canadian airports.
• Actuator Mechanism: The main landing gear actuator in early Q400 models was found to be susceptible to unintended movement due to vibration or electrical surges, prompting redesigns.
• Warning Systems: The aircraft features audio and visual alerts for gear position; however, in the Colgan crash, crew confusion over stall warnings overshadowed gear status alerts.
• Maintenance Protocols: Scheduled checks of the landing gear torque links and downlock springs were increased from every 600 to every 300 flight hours following 2007 incidents.
• Pilot Training: Simulator training for gear-up landings and emergency extension procedures was enhanced across regional carriers operating the Dash 8 fleet.

Comparison at a Glance

The following table compares key Dash 8 variants and their landing gear incident rates during 2007.

While the Q400 model accounted for over half of the incidents, the overall safety record of the Dash 8 series remained strong. However, the concentration of events in early 2007 prompted industry-wide reviews of winter operations and maintenance practices.

Why It Matters

The 2007 Dash 8 landing gear incidents had lasting impacts on aviation safety standards, pilot training, and aircraft design. These events underscored the critical interaction between mechanical systems and human factors in high-stress flight environments.

• The Colgan crash led to revised FAA regulations requiring 1,500 flight hours for first officers, significantly raising pilot qualification standards.
• De Havilland implemented design changes to the Q400’s landing gear actuator to prevent unintended retraction during taxiing or takeoff roll.
• Several regional airlines, including Colgan and Pinnacle, revised their de-icing checklists to include mandatory post-deice landing gear checks.
• The NTSB recommended enhanced stall recognition training, which was adopted across U.S. regional carriers by 2009.
• Insurance premiums for Dash 8 operators increased by 12–18% in 2008 due to perceived risk following the incidents.
• The events contributed to a broader push for real-time flight data monitoring in regional aviation, later mandated by the FAA in 2010.

Ultimately, the 2007 incidents served as a catalyst for improved safety culture in regional air travel, emphasizing the need for robust maintenance, better training, and responsive regulatory oversight.