A subsequent investigation report summarized the incident in this manner: "An initial mechanical failure which precluded feathering the no. 1 propeller and a subsequent mechanical failure which resulted in a complete loss of power from the no. 4 engine, the effects of which necessitated a ditching."
Un informe posterior de investigación resumiu o incidente deste xeito: "Un fallo mecánico inicial que impedía poñer en bandeira a hélice 1 e un fallo mecánico posterior que resultou nunha completa perda de potencia do motor 4, cuxo efecto precisou a necesidade dunha amaraxe".