Casualties unknown

1996-11-05: Cessna 177B (N34994) — Chancellor, SD

Chancellor, SD, US

On November 5, 1996, a Cessna 177B (registration N34994) was involved in an aviation accident near Chancellor, SD. Investigators recorded the probable cause as: the pilot's attempted flight with known deficiencies in equipment, his initiating VFR flight into IMC conditions, his spatial disorientation and loss of control of the airplane. Factors were fog, dark night, and inoperative directional gyro. 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 1781061362Data APIEditorial standards

A noninstrument-rated pilot, operating with an inoperative directional gyro, requested a landing at a controlled airport during night instrument meteorological conditions. The controller suggested headings to an uncontrolled airport, but the pilot could not navigate there. The airplane departed controlled flight and impacted terrain. Investigation revealed no additional pre-existing anomalies.

Background

The pilot of the accident flight held no instrument rating. The aircraft was being operated with an inoperative directional gyro, a key component for navigation and attitude reference in low-visibility conditions.

Flight and Accident Sequence

The flight arrived at a controlled airport during nighttime and requested a landing. At the time, the airport reported instrument meteorological conditions (IMC), meaning low clouds, reduced visibility, or both. The air traffic controller, instead of providing an approach clearance, suggested headings to an uncontrolled airport. The pilot attempted to follow the guidance but was unable to navigate to the suggested location. Subsequently, the airplane departed from controlled flight—that is, the pilot lost command of the aircraft's attitude or trajectory—and struck the ground.

Investigation

A thorough investigation of the aircraft did not identify any pre-existing mechanical or structural anomalies that could have contributed to the loss of control or impact. The findings focused solely on the pilot's limitations and the aircraft's equipment status as described above.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X06997. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.