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ASN Wikibase Occurrence # 156053
Last updated: 5 August 2019
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Date:22-MAY-2013
Time:17:30
Type:Silhouette image of generic DV20 model; specific model in this crash may look slightly different
Diamond DA 20-C1
Owner/operator:5280 Flying Club LLC
Registration: N571MA
C/n / msn: C0271
Fatalities:Fatalities: 0 / Occupants: 2
Aircraft damage: Substantial
Category:Accident
Location:Centennial Airport - KAPA, Denver, CO -   United States of America
Phase: Landing
Nature:Training
Departure airport:Englewood, CO (KAPA)
Destination airport:Englewood, CO (KAPA)
Investigating agency: NTSB
Narrative:
While on final approach during an instructional flight, the engine became unresponsive to throttle movements. The flight instructor took control of the airplane from the student pilot and made a forced landing, during which the airplane rolled onto soft ground and nosed over to an inverted position. Engine examination revealed that the engine throttle lever and throttle cable had become disconnected and that the bolt connecting these two components was located at the bottom of the engine cowling. A self-locking nut, which normally secures this bolt, was missing and not located. Therefore, it is likely that maintenance personnel did not apply sufficient torque to the nut or improperly reused a degraded self-locking nut, which resulted in the eventual loosening of the nut and the in-flight separation of the engine throttle lever and throttle cable.
Probable Cause: 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.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20130523X25530&key=1
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=571MA


Revision history:

Date/timeContributorUpdates
23-May-2013 13:37 gerard57 Added
23-May-2013 22:03 Geno Updated [Registration, Cn, Operator, Location, Nature, Destination airport, Source, Narrative]
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
28-Nov-2017 14:38 ASN Update Bot Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative]

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