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ASN Wikibase Occurrence # 223282
Last updated: 16 September 2021
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Time:09:20 LT
Type:Silhouette image of generic EN48 model; specific model in this crash may look slightly different
Enstrom 480B-G
Owner/operator:DSA (Delta System Air a.s.)
Registration: OK-CLV
MSN: 5244
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Blažkov -   Czech Republic
Phase: En route
Departure airport:
Destination airport:
Investigating agency: UZPLN
An Enstrom 480 B helicopter crashed in a field approximately 100 m east of the village of Blažkov near Nové Město nad Metují. The pilot of the helicopter, a foreign national, together with a pilot-instructor, was conducting a training flight. It was a training flight according to instruments according to the training syllabus approved by the foreign training client. After approximately 1 hour of flight, the pilot performed two 360° left turns. After completing them to a heading of approximately 060° at 4,500 ft, the AMSL smoothly continued to turn right. After completing about 270°, the helicopter went into an unusual "back" attitude. In this position, at a steep angle with the nose pitched approximately 20° below the horizon, it descended rapidly to the ground and exploded upon impact with the ground. The helicopter was completely destroyed by the impact and subsequent fire. The crew perished in the wreckage of the helicopter.

The cause of the accident was exceeding the VNE's maximum allowable airspeed in an extreme engine descent, when probably after a sharp lift of the collective lever, the streamlines on the receding blade were torn off and the lift on the left half of the rotor disc was lost. The helicopter went into an unusual supine flight attitude which the crew were unable to control.


Accident investigation:
Investigating agency: UZPLN
Status: Investigation completed
Download report: Final report


Revision history:

22-Mar-2019 12:21 Iceman 29 Added
22-Mar-2019 12:22 Iceman 29 Updated [Source, Narrative]
22-Mar-2019 12:25 Iceman 29 Updated [Time, Narrative]
22-Mar-2019 12:26 Iceman 29 Updated [Source, Narrative]
22-Mar-2019 12:30 Iceman 29 Updated [Embed code]
22-Mar-2019 12:36 Iceman 29 Updated [Aircraft type, Operator, Source, Embed code]
22-Mar-2019 14:33 RobertMB Updated [Aircraft type, Registration, Cn, Operator, Source, Narrative]
22-Mar-2019 15:20 ctyone Updated [Aircraft type, Registration, Cn, Source]
22-Mar-2019 16:28 RobertMB Updated [Aircraft type, Source, Narrative]
22-Mar-2019 21:16 Iceman 29 Updated [Operator]
23-Mar-2019 11:36 harro Updated [Narrative]
23-Mar-2019 18:19 Jarda Vesely Updated [Narrative]
31-May-2021 17:41 harro Updated [Location, Nature, Narrative, Accident report]

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