What happened
The incident occurred during a training mission conducted off the coast of San Francisco. The aircraft was engaged in practice landing maneuvers when it made contact with the water surface. Upon impact, the seaplane plunged beneath the waves and sank. The accident resulted in three fatalities and left six other crew members injured.
Findings
Official investigations indicated that the crash stemmed from several operational errors. A primary factor was the decision to practice instrument landings on the water rather than at a safe altitude, which limited escape options. Additionally, there was an error in judgment regarding the reliance on an inexperienced second pilot to serve as the safety pilot. Technical execution of the landing attempt also contributed to the outcome.
Weather conditions and the potential presence of underwater obstructions may have played a contributing role. The investigation concluded that the accident could have been prevented if the pilot had broken the glide path before water impact. It is believed that either the second pilot failed to adequately communicate the aircraft's altitude and attitude, or the primary pilot was unable to respond to the warnings in time.