Cessna 208B Grand Caravan — Airworthiness Directives

This document is an investigation report by the Australian Transport Safety Bureau (ATSB) concerning a serious incident involving a Cessna 208B aircraft, registration VH-WZJ. The incident occurred on November 10, 2015, when the aircraft experienced a flap system failure during an instrument approach to Townsville Airport, Queensland. The report details the sequence of events leading to the incident, including the pilot's actions and the subsequent investigation findings. It highlights the mechanical and electrical components of the flap system, the maintenance practices in place, and the safety actions taken by the operator, West Wing Aviation, in response to the incident. The report aims to improve safety awareness and prevent similar occurrences in the future.

• Incident occurred on November 10, 2015, involving Cessna 208B, registration VH-WZJ.
• Flap system failure led to a loss of control during approach, but the aircraft landed safely with no injuries.
• The flap system allows for positions between 0 and 30 degrees, with a primary and standby motor.
• A loose flap bell crank retaining bolt was identified as the cause of the incident.
• West Wing Aviation has amended their maintenance program to improve safety and prevent similar incidents.