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DEN92IA067

1992-06-28 · SCIPIO, Utah, United States · None · 1 aircraft · Status: Completed

N222UH has since been reassigned. It is now registered to a different aircraft (ROBINSON HELICOPTER R44 II, built 2008), which was not involved in this event.

Aircraft involved

Probable cause & findings

AN ENCOUNTER WITH CLEAR AIR TURBULENCE.

Factual narrative

THE EMS HELICOPTER ENCOUNTERED CLEAR AIR TURBULENCE WHILE EN ROUTE TO PICK UP A PATIENT. DURING THE EVENT, THE NOSE PITCHED UP RAPIDLY TO ABOUT 20 DEGREES, ACTIVATING THE ELT. THE PILOT FELT FEEDBACK THROUGH THE CONTROLS AND LANDED TO RESET THE ELT. LATER, THE PILOT NOTED MAST TORQUE FLUCTUATIONS FOLLOWED BY A ZERO READING ON THE GAUGE. POSTFLIGHT INSPECTION DISCLOSED THE TRANSMISSION HAD CONTACTED ITS MOUNTS, SEVERING SEVERAL ELECTRICAL LEADS INCLUDING THE TORQUE SENSOR. A CRACK WAS ALSO DISCOVERED ABOUT 2 1/2 FEET OUTBOARD OF THE MAIN BLADE GRIP, PROPAGATING BACK FROM THE BLADE LEADING EDGE. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1992_DEN92IA067.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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Related research

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