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Engine Power Loss During Maneuvering Over Great Salt Lake (N91130)

Grantsville, UT, US

On January 12, 1996, a Cessna 182 (registration N91130) was involved in an aviation accident near Grantsville, UT. Investigators recorded the probable cause as: the failure of the #5 exhaust valve rocker boss, and the subsequent sticking of the exhaust valve in the closed position. Factors include wet, soft terrain in the only available landing area. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 8 related events involving the same aircraft type or operator are linked below.

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

An aircraft experienced substantial engine power loss while maneuvering over the Great Salt Lake, leading to an emergency landing on Carrington Island. The aircraft nosed over on soft terrain. Examination found a failed exhaust valve rocker boss.

Maneuvering and Power Loss

While the aircraft was maneuvering over the Great Salt Lake, the engine suffered a substantial loss of power. This loss of power led to a descent. The pilot, assessing the situation, saw that the only land within reach was Carrington Island. He guided the aircraft towards the island and performed an emergency landing on its shore.

Emergency Landing

The landing site on the island's shore consisted of soft, muddy terrain. Upon contact with the ground, the aircraft nosed over. The aircraft came to rest in a nose-over attitude.

Engine Inspection

After the incident, an inspection of the engine was conducted. The inspection revealed that the number 5 exhaust valve rocker boss had failed. This failure caused the exhaust valve to remain in the closed position. The engine was not able to operate normally with this condition.

Further Information

No additional information about the aircraft type, registration number, operator, or occupants has been released. There is no mention of the date or time of the incident. The investigation continues.

Engine failure

Related events

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Frequently asked questions

What happened in the 12 Jan 1996 Cessna 182 accident near Grantsville, UT?

An aircraft experienced substantial engine power loss while maneuvering over the Great Salt Lake, leading to an emergency landing on Carrington Island. The aircraft nosed over on soft terrain. Examination found a failed exhaust valve rocker boss.

What aircraft was involved and where did it happen?

The accident on 12 Jan 1996 involved a Cessna 182, registration N91130, at Grantsville, UT.

What was the probable cause of the accident?

the failure of the #5 exhaust valve rocker boss, and the subsequent sticking of the exhaust valve in the closed position. Factors include wet, soft terrain in the only available landing area.

More accident analyses

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X05202. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.