Aviation Accident Summary SEA82DA047

SILETZ, OR, USA

Aircraft #1

N47246

SIKORSKY S-58J

Analysis

AFTER LIFT-OFF WITH A 3000 POUND EXTERNAL SLING LOAD, A "POP" WAS HEARD FOLLOWED BY LOW-LEVEL VIBRATION. ROTOR RPM DECAYED AND AN AUTOROTATION WAS EFFECTED TO A FORCED LANDING IN A REVINE. POSTCRASH INSPECTION REVEALED A FAILURE OF THE ENGINE DRIVE "SHORT SHAFT".

 

Source: NTSB Aviation Accident Database

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