What happened
The incident occurred while the aircraft was en route and cruising at night. The flight took place under marginal weather conditions. During this phase of the operation, the seaplane struck the slope of Mt Beenoskee. This location is situated southwest of Castlegregory in County Kerry, Ireland.
The impact resulted in the death of all personnel on board. There were nine crew members killed in the accident. The team included a pilot, a copilot, a navigator, a mechanic, a flight engineer, two wireless operators who also served as air gunners, and two additional crew members.
Findings
The source material indicates that the collision happened while the aircraft was navigating at night in poor visibility or weather conditions. The specific terrain feature involved was the slope of Mt Beenoskee. No further technical investigation details or mechanical failure reports are provided in the available records.