ASN Wikibase Occurrence # 147398
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| Date: | Friday 3 August 2012 |
| Time: | 19:30 LT |
| Type: |  Mil Mi-8T |
| Owner/operator: | Techmont Heli Co. |
| Registration: | OM-TMT |
| MSN: | 98308361 |
| Year of manufacture: | 1983 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Location: | near Poprad-Tatry Airport - LZTT -
 Slovakia
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | LZTT |
| Confidence Rating: |  Information is only available from news, social media or unofficial sources |
During the construction works this helicopter flew several times to Chata pod Rysmi mountain hut, located at 2250 meters over the sea. When the goods were offloaded there (carried on the rope under the helicopter), during the steep descent through the valley the free end of the rope hit the tail rotor blades, causing damage to it. The crew was able to fly the chopper to Poprad airport (TAT/ LZTT), but on approach controlling the helicopter became more and more difficult until it crash-landed within the airport perimeter and rolled to its side with main rotor and tail section destructed. OM-TMT was written off afterwards. Not any serious injuries to its crew.
Causes of air accidents:
• the entry of the helicopter in a massive vortex generated by convective activity in its descending part. The acummulation of the helicopter swing and the assymetric air circulation with regard to the lateral motion provoked by MR activated an impulse which at a speed of 180 km.h-1 tossed the loose end of transport cable to the working area of antitorque
rotor;
• the pilot´s decision to make hover landing with damaged anti-torque rotor. This type of landing manoeuvre requires higher engine output and hence increased reaction moment, which the damaged anti-torque rotor was unable to counterbalance even by full actuation of the rudder pedal.
Secondary cause:
• performance of aerial work in difficult mountain terrain and specific weather conditions.
Sources:
http://tvnoviny.sk/sekcia/spravy/krimi-a-nehody/na-popradskom-letisku-padol-vrtulnik.html
https://spis.korzar.sme.sk/c/6483451/na-popradskom-letisku-havaroval-vrtulnik.html
http://www.teraz.sk/regiony/na-popradskom-letisku-padol-vrtulnik/17949-clanok.html
https://www.mindop.sk/index/open_file.php?file=doprava/uvlni/SKA2012012_EN.pdf&lang=en_
Images:
LZSV Spisska Nova Ves; July 18, 2009
OM-TNT at Nitra back in 2008 photo: Peter Hupka
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 03-Aug-2012 12:25 | Anon. | Added |
| 03-Aug-2012 12:26 | harro | Updated [Aircraft type, Total fatalities, Other fatalities, Damage, Narrative] |
| 03-Aug-2012 12:30 | Anon. | Updated [Time] |
| 03-Aug-2012 12:48 | DaPlane | Updated [Registration, Operator] |
| 03-Aug-2012 12:50 | Anon. | Updated [Total occupants, Source] |
| 04-Aug-2012 01:02 | DaPlane | Updated [Embed code] |
| 04-Aug-2012 01:06 | harro | Updated [Aircraft type, Cn, Operator, Total occupants, Location, Phase, Departure airport, Narrative] |
| 07-Aug-2012 09:47 | Alpine Flight | Updated [Time, Location, Departure airport] |
| 17-Aug-2012 03:13 | Lubos Sramek | Updated [[Time, Location, Departure airport]] |
| 25-Dec-2015 08:45 | Anon. | Updated [Source, Narrative, Photo, ] |
| 21-Aug-2017 20:45 | Aerossurance | Updated [Source] |
| 21-Aug-2017 21:09 | Aerossurance | Updated [Location, Source, Narrative] |
Corrections or additions? ... Edit this accident description
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