ATSB probes floatplane crash: wing penetration, stall warning disconnect, and water survival gaps.
ATSB interim report on Rottnest Island floatplane accident reveals critical findings on crashworthiness, emergency procedures, and operational risk controls
The ATSB today released an interim report on the 7 January 2025 Cessna 208 Caravan floatplane accident at Rottnest Island that killed the pilot and two passengers.
What was learned
Wing penetration killed passengers
Wreckage examination showed the wings hinged backwards at impact, with trailing edges penetrating the cabin at the second row of passenger seating. Pathologist identified drowning as cause of death for the pilot and one first-row passenger, and drowning with head injury for the second-row passenger.
Stall warning system routinely disconnected
The stall warning circuit breaker was found disconnected. Experienced Caravan amphibian pilots report false alarms from the stall warning system during water takeoffs cause loud distractions and passenger concern, leading to an industry practice of disconnecting the circuit breaker before takeoff—despite handbook instructions to have all breakers in.
What the ATSB is investigating
Crashworthiness and water survival
The investigation is examining the Cessna Caravan's crashworthiness and the suitability of manufacturer and operator emergency equipment and procedures for water immersion accidents.
Operational risk controls
Investigators will review the pilot's decision-making in strong crosswinds and light tailwinds, plus Swan River Seaplanes' procedures and risk controls for Thomson Bay operations, including how the operator identified and assessed the location for floatplane operations.
Industry practice implications
The investigation will consider implications of the reported industry practice of disconnecting the stall warning system circuit breaker prior to takeoff.
Final report expected second half of 2026.