Incident Overview
Date: Tuesday 19 December 2017
Aircraft Type: Antonov TVS-2MS
Owner/operator: Naryan-Mar Air Enterprise
Registration Number: RA-01460
Location: Naryan-Mar Airport (NNM) –
ÿ Russia
Phase of Flight: Take off
Status: Destroyed, written off
Casualties: Fatalities: 4 / Occupants: 13
Component Affected: Aircraft ? Antonov TVS-2MSAircraft ? Antonov TVS-2MS
Investigating Agency: MAKMAK
Category: Accident
An Antonov TVS-2MS, a converted Antonov An-2TP, experienced a crash during takeoff from Naryan-Mar Airport, Russia. The aircraft was modified with a TPE331 turbine engine, replacing the original Shvetzov ASH-62IR radial piston engine. The crash occurred during daylight, in visual weather conditions, due to exceeding supercritical angles of attack and stall mode at a true altitude of approximately 60 meters during the climb phase after takeoff with an alignment of at least 34% of the MAC.An Antonov TVS-2MS, a converted Antonov An-2TP, experienced a crash during takeoff from Naryan-Mar Airport, Russia. The aircraft was modified with a TPE331 turbine engine, replacing the original Shvetzov ASH-62IR radial piston engine. The crash occurred during daylight, in visual weather conditions, due to exceeding supercritical angles of attack and stall mode at a true altitude of approximately 60 meters during the climb phase after takeoff with an alignment of at least 34% of the MAC.
Description
The Antonov TVS-2MS impacted the ground during takeoff from Naryan-Mar Airport, Russia. The TVS-2MS was an Antonov An-2TP that was converted in 2014 with a TPE331 turbine engine instead of the original Shvetzov ASH-62IR radial piston engine. Conclusion: The crash of TVS-2MS RA-01640 occurred in the daytime, in visual weather conditions, as a result of the aircraft reaching supercritical angles of attack and stall mode at a true altitude of about 60 m during the climb phase after takeoff with an alignment of at least 34% of the MAC, which significantly exceeds the AFM limitation on the value of the maximum rear alignment (29.5% of the MAC).
Primary Cause
Excessive supercritical angles of attack and stall mode during climb, exceeding AFM limitations on maximum rear alignment.Excessive supercritical angles of attack and stall mode during climb, exceeding AFM limitations on maximum rear alignment.Share on:
