Summary
On June 22, 1996, a Grumman-schweizer G-164A (N4698) was involved in an incident near Holyoke, CO. All 1 person aboard were uninjured. The aircraft sustained substantial damage.
The National Transportation Safety Board determined the probable cause of this incident to be: The total failure of the engine main bearing. A factor was the soft terrain condition on which the forced landing was made.
On June 22, 1996, approximately 0730 mountain daylight time, a Grumman-Schweizer G-164A, N4698, was substantially damaged during a forced landing at Holyoke, Colorado. The commercial pilot was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the aerial application flight conducted under Title 14 CFR Part 137. The flight was originating when the accident occurred.
The pilot said that shortly after takeoff, the engine began to vibrate and the control stick shook. He initiated a shallow left turn, and the engine began losing power. As he rolled out of the turn, the engine quit.
This incident is documented in NTSB report FTW96LA272. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N4698.
Accident Details
Probable Cause and Findings
the total failure of the engine main bearing. A factor was the soft terrain condition on which the forced landing was made.
Aircraft Information
Registered Owner (Current)
Analysis
On June 22, 1996, approximately 0730 mountain daylight time, a Grumman-Schweizer G-164A, N4698, was substantially damaged during a forced landing at Holyoke, Colorado. The commercial pilot was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the aerial application flight conducted under Title 14 CFR Part 137. The flight was originating when the accident occurred.
The pilot said that shortly after takeoff, the engine began to vibrate and the control stick shook. He initiated a shallow left turn, and the engine began losing power. As he rolled out of the turn, the engine quit. He made a forced landing in a soft field and the airplane nosed over.
The engine and propeller were examined at the facilities of Hershey Aircraft Services, Hershey, Nebraska. An FAA inspector from the Lincoln, Nebraska, Flight Standards District Office monitored the examination. Initially nothing was found that would explain the vibration and subsequent loss of engine power. Later, the oil sump was removed and ferrous metal was observed in the sump. The filters and screens, however, were clear of debris. A spokesman for Hershey Aircraft Services said there was evidence that the main bearing had failed, causing the engine to seize.
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# FTW96LA272