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ASN Wikibase Occurrence # 152568
Last updated: 10 July 2020
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Date:13-JAN-2013
Time:16:20HL
Type:Silhouette image of generic MI8 model; specific model in this crash may look slightly different
Mil Mi-171
Owner/operator:Helistar
Registration: HK-4575
C/n / msn: 171E00064402408U
Fatalities:Fatalities: 0 / Occupants: 8
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Base Costayaco, Villagarzon -   Colombia
Phase: Take off
Nature:Test
Departure airport:Base Costayaco
Destination airport:Base Costayaco
Investigating agency: Aerocivil
Narrative:
The Mi-17 helicopter, registration HK-4575, was scheduled by the operator to perform a flight control check
after changing the 90 gearbox of the tail rotor.
On takeoff a continuous loud noise was heard accompanied by a high frequency vibration . The helicopter turned sharply to the right and crashed from a height of approximately 30 meters.

Probable Cause
The probable cause of the accident was the incorrect installation of the three (03) tail rotor blades which generated high frequency vibration and fracture of the helicopter's tail boom in flight.

Sources:

El tiempo
http://www.aerocivil.gov.co/autoridad-de-la-aviacion-civil/investigacion/Histricos%20Accidentes/HK4575.pdf

Accident investigation:
cover
  
Investigating agency: Aerocivil
Status: Investigation completed
Duration:
Download report: Final report


Revision history:

Date/timeContributorUpdates
16-Jan-2013 12:27 antares Added
16-Jan-2013 14:11 gerard57 Updated [Aircraft type]
10-Jul-2020 06:45 KagurazakaHanayo Updated [Time, Aircraft type, Registration, Cn, Operator, Total occupants, Source, Narrative]
10-Jul-2020 07:18 harro Updated [Source, Accident report, ]

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