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Helicopter Accident Following Throttle Stuck Open and Overspeed (N1200Z)

Lantana, FL, US

On December 15, 1996, a Bell 47G (registration N1200Z) operated by Donald S. Lloyd was involved in an aviation accident near Lantana, FL. Investigators recorded the probable cause as: an undetermined throttle problem, which resulted in a stuck (binding) throttle; and inadequate remedial action by the pilot, which led to a hard landing and subsequent nose over. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-07-04Data APIEditorial standards

A pilot reported that during landing descent, the throttle stuck open causing engine overspeed. The helicopter entered autorotation but did not flare, resulting in a nose-high collision, bounce, nosed over, and inverted rest. Postcrash fire destroyed the helicopter; no pre-accident deficiency found.

Accident Sequence

The pilot was descending on right base for landing when the throttle became stuck in the full open position, causing the engine to overspeed. In response, the pilot entered autorotation—a maneuver to maintain rotor speed without engine power—and turned the helicopter into the wind. Reportedly, the pilot did not initiate a deceleration flare. The helicopter subsequently collided with the ground in a nose-high attitude. After impact, the helicopter bounced, nosed over, and came to rest inverted. A postcrash fire then destroyed the helicopter.

Investigation Findings

Examination of the wreckage revealed no pre-accident mechanical deficiency. The pilot's statement indicated the throttle stuck open and engine overspeed, but investigators found no evidence of a pre-existing fault. No factors beyond the reported throttle malfunction and the absence of a flare were identified.

Frequently asked questions

What happened in the 15 Dec 1996 Bell 47G accident near Lantana, FL?

A pilot reported that during landing descent, the throttle stuck open causing engine overspeed. The helicopter entered autorotation but did not flare, resulting in a nose-high collision, bounce, nosed over, and inverted rest. Postcrash fire destroyed the helicopter; no pre-accident deficiency found.

What aircraft was involved and where did it happen?

The accident on 15 Dec 1996 involved a Bell 47G, registration N1200Z, operated by Donald S. Lloyd, at Lantana, FL.

What was the probable cause of the accident?

an undetermined throttle problem, which resulted in a stuck (binding) throttle; and inadequate remedial action by the pilot, which led to a hard landing and subsequent nose over.

More accident analyses

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X07213. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.