510 — Cessna Aircraft Company 510

This document is an accident report by the Australian Transport Safety Bureau (ATSB) detailing a runway excursion involving a Cessna 510 Citation Mustang, registered VH-SQY, on January 11, 2025. The aircraft was conducting a non-emergency medical transport flight from Narrandera Airport to Bankstown Airport. During landing, the pilot encountered reduced braking performance due to a combination of factors including a tailwind, wet runway conditions, and worn tyres. The report outlines the circumstances of the incident, findings from the investigation, and subsequent safety actions taken by the operator and relevant authorities. It serves as a critical resource for understanding the operational challenges and safety measures associated with the Cessna 510.

• The Cessna 510 experienced a runway excursion due to reduced braking performance on a wet runway.
• The aircraft had worn main landing gear tyres, with tread depths of 0.013 inches (0.3 mm) and 0.019 inches (0.5 mm).
• A tailwind of 6 knots was recorded during the landing, contributing to the incident.
• AirMed updated its operations manual to require a 60% landing distance factor for wet conditions.
• The importance of conducting accurate landing distance calculations was emphasized in the report.