Ditching in Atlantic Ocean After Engine Power Loss Due to Compressor Air Line Failure (N60C)

Accident Overview

An aircraft was ditched in the Atlantic Ocean after experiencing a loss of engine power. The crew performed the ditching as a result of the power reduction. The aircraft and engine were subsequently recovered from the ocean for examination.

Investigation

Post-crash inspection of the engine revealed that the PC or compressor pressure air line had failed at a 'B' nut at the compressor scroll. The failure of this line prevented the engine from operating above idle speed. A metallurgical examination of the failed line was conducted to determine the cause of the failure.

Findings

The metallurgical examination determined that the line failed due to fatigue. This fatigue was caused by the line being misaligned during installation. The misalignment led to cyclic stresses that ultimately resulted in the failure at the 'B' nut connection. No other anomalies were noted in the engine or aircraft systems.