Abnormal engine indications involving a Sikorsky S-76A, VH-EMX, near Snapper Oil Rig, Victoria, on 28 March 1993

Whilst enroute Barracouta to Snapper Oil Platform the number 2 engine oil pressure began to fluctuate. At Snapper the fluctuations became worse. The pilot-in-command decided to return the helicopter to Longford. Enroute Longford the oil pressure fell below minimum allowable. The pilot shut down number 2 engine and subsequently carried out a safe single engine landing at Longford. It was discovered by the engineers that the starter generator oil seal had popped out on the number 2 engine. Several quarts of oil had been pumped overboard in flight. It was found that only one quart of oil was left in number 2 engine when the pilot elected to shut down the engine.

Significant Factor

The following factor was considered relevant to the development of the incident:

1. The starter generator oil seal failed.