Summary
On July 08, 1989, a Grumman G-164 (N788Y) was involved in an accident near Guymon, OK. The accident resulted in 1 serious injury. The aircraft sustained substantial damage.
The National Transportation Safety Board determined the probable cause of this accident to be: FAILURE OF THE UPPER RIGHT ENGINE MOUNT (FIREWALL ATTACH BOLT) DUE TO FATIGUE, AND FAILURE OF THE LOWER RIGHT MOUNTING BOLT FOR AN UNKNOWN REASON, WHICH ALLOWED OVERLOAD FAILURE OF THE TWO REMAINING MOUNTING BOLTS AND SEPARATION OF THE ENGINE.
This accident is documented in NTSB report FTW89DPJ08. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N788Y.
Accident Details
Probable Cause and Findings
FAILURE OF THE UPPER RIGHT ENGINE MOUNT (FIREWALL ATTACH BOLT) DUE TO FATIGUE, AND FAILURE OF THE LOWER RIGHT MOUNTING BOLT FOR AN UNKNOWN REASON, WHICH ALLOWED OVERLOAD FAILURE OF THE TWO REMAINING MOUNTING BOLTS AND SEPARATION OF THE ENGINE.
Aircraft Information
Registered Owner (Historical)
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# FTW89DPJ08