On October 23, 1991, a Mcdonnell Douglas MD369D (registration N88SE) operated by Miami Valley Services was involved in an aviation accident near Beech Grove, IN. No fatalities were reported. Investigators recorded the probable cause as: IMPROPER INSTALLATION OF THE FLIGHT CONTROL LINKAGE DURING MAINTENANCE. COMPLACENCY AND INADEQUATE INSPECTION OF THE HELICOPTER BY MAINTENANCE PERSONNEL AND THE PILOT ARE FACTORS IN THE ACCIDENT. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A helicopter experienced a loss of cyclic pitch control during lift-off, pitching up and striking the tail rotor. Substantial damage occurred; all occupants uninjured. Investigation revealed a flight control linkage disconnect with a missing bolt.
Accident Summary
At the start of a business flight, the helicopter experienced a loss of cyclic pitch control during lift-off to a hover. The helicopter pitched up, causing the tail rotor to strike the ground. The aircraft then rolled onto its right side, sustaining substantial damage. The commercial pilot and two passengers were not injured.
Investigation Findings
On-scene inspection of the wreckage revealed a flight control linkage disconnect. A missing bolt was found on the ground next to the helicopter. The other connecting hardware was not located.
Pilot Statement
In a statement, the pilot noted that he did not observe the missing nut during his preflight inspection.
What happened in the 23 Oct 1991 Mcdonnell Douglas MD369D accident near Beech Grove, IN?
A helicopter experienced a loss of cyclic pitch control during lift-off, pitching up and striking the tail rotor. Substantial damage occurred; all occupants uninjured. Investigation revealed a flight control linkage disconnect with a missing bolt.
Were there any fatalities in the 23 Oct 1991 Mcdonnell Douglas MD369D accident?
No fatalities were recorded in this accident.
What aircraft was involved and where did it happen?
The accident on 23 Oct 1991 involved a Mcdonnell Douglas MD369D, registration N88SE, operated by Miami Valley Services, at Beech Grove, IN.
What was the probable cause of the accident?
IMPROPER INSTALLATION OF THE FLIGHT CONTROL LINKAGE DURING MAINTENANCE. COMPLACENCY AND INADEQUATE INSPECTION OF THE HELICOPTER BY MAINTENANCE PERSONNEL AND THE PILOT ARE FACTORS IN THE ACCIDENT.
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