What aircraft was involved and where did it happen?

The accident on 1993-04-29 involved a Beech C99, registration N115GP, at Shelton, NE.

Part 135 Proficiency Check Flight Ends in Impact After Discussion of Prohibited Aerobatic Maneuver (N115GP)

On April 29, 1993, a Beech C99 (registration N115GP) was involved in an aviation accident near Shelton, NE. Investigators recorded the probable cause as: THE DELIBERATE DISREGARD FOR THE FEDERAL AVIATION REGULATIONS, GP EXPRESS PROCEDURES, AND PRUDENT CONCERN FOR SAFETY BY THE TWO PILOTS IN THEIR DECISION TO EXECUTE AN AEROBATIC MANEUVER DURING A SCHEDULED CHECK RIDE FLIGHT, AND THE FAILURE OF GP EXPRESS… 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 API Editorial standards

A Part 135 proficiency check flight ended when the aircraft impacted terrain following cockpit discussion of a prohibited aerobatic maneuver. The pilots, both check airmen, had been discussing a barrel roll before the recording ended. The aircraft struck with nose level and left wing down.

Background

The flight was conducted as a Part 135 six-month proficiency check for the pilot in the left seat. Both pilots on board were check airmen for the commuter air carrier. The aircraft departed at 2343, following the cessation of the company's revenue operations for the day.

Cockpit Voice Recorder

The cockpit voice recorder (CVR) captured conversations between the two pilots. During the flight, the pilots discussed aerobatic maneuvers. The pilot in the left seat began to describe the execution of a prohibited maneuver, identified as apparently a barrel roll. The CVR recording ended before the description of the maneuver was completed.

Impact and Evidence

The airplane impacted the ground in a nose-level attitude with a slight left wing down orientation. Investigators found evidence that the prohibited maneuver had been performed at an altitude insufficient to ensure the safe recovery of the airplane. No further details regarding the specific altitude or maneuver parameters were provided.

Post-Accident Items

A completed grade sheet for the proficiency check being flown was discovered in the check airman's mailbox. The contents of the grade sheet were not detailed in the investigation summary.

Reference

The National Transportation Safety Board (NTSB) has published a summary report under identifier NTSB/AAR-94/01/SUM, which contains additional information on this accident.

1993-04-29: Beech C99 (N115GP) — Shelton, NE