Summary
On May 22, 2013, a Diamond Aircraft Ind INC DA 20-C1 (N571MA) was involved in an accident near Englewood, CO. The accident resulted in 2 minor injuries. The aircraft sustained substantial damage.
The National Transportation Safety Board determined the probable cause of this accident to be: The in-flight separation of the engine throttle lever and throttle cable due to maintenance personnel not applying sufficient torque to the self-locking nut or improperly reusing a degraded self-locking nut.
On May 22, 2013, about 1730 mountain daylight time, a Diamond DA-20-C1 airplane, N571MA, was substantially damaged during a forced landing at Centennial Airport (KAPA), Englewood, Colorado. The flight instructor and student pilot received minor injuries. The airplane was registered to 5280 Flying Club LLC and operated under the provisions of 14 Code of Federal Regulations Part 91 as an instructional flight. Day visual meteorological conditions prevailed for the local flight, and no flight plan had been filed.
The flight instructor stated that the student pilot was flying a visual approach to a full stop landing at KAPA. While on final approach, the engine became unresponsive to throttle movement. The flight instructor took control of the airplane and attempted to restart the engine.
This accident is documented in NTSB report CEN13LA291. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N571MA.
Accident Details
Probable Cause and Findings
The in-flight separation of the engine throttle lever and throttle cable due to maintenance personnel not applying sufficient torque to the self-locking nut or improperly reusing a degraded self-locking nut.
Aircraft Information
Registered Owner (Historical)
Analysis
On May 22, 2013, about 1730 mountain daylight time, a Diamond DA-20-C1 airplane, N571MA, was substantially damaged during a forced landing at Centennial Airport (KAPA), Englewood, Colorado. The flight instructor and student pilot received minor injuries. The airplane was registered to 5280 Flying Club LLC and operated under the provisions of 14 Code of Federal Regulations Part 91 as an instructional flight. Day visual meteorological conditions prevailed for the local flight, and no flight plan had been filed.
The flight instructor stated that the student pilot was flying a visual approach to a full stop landing at KAPA. While on final approach, the engine became unresponsive to throttle movement. The flight instructor took control of the airplane and attempted to restart the engine. With no increase in engine power, a forced landing was made and the airplane touched down just short of the runway threshold. After touchdown, the airplane rolled onto soft terrain and nosed over to an inverted position.
During the engine examination, Federal Aviation Administration (FAA) personnel discovered that the engine throttle lever and throttle cable were disconnected. The bolt normally connecting these two components was located at the bottom of the engine cowling. A self-locking nut (Diamond part number MS21042-3), which normally secures this bolt, was missing and not located. No other anomalies were noticed with the engine.
FAA review of airplane records indicated that the engine was removed and re-installed on March 15, 2013 to facilitate the repair of a loose crankcase stud. The airplane flew 100.1 hours after engine re-installation until the accident.
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# CEN13LA291