Accident Mil Mi-2 RA-20977,
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ASN Wikibase Occurrence # 249858
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Date:Saturday 17 April 2021
Time:13:47 LT
Type:Silhouette image of generic MI2 model; specific model in this crash may look slightly different    
Mil Mi-2
Registration: RA-20977
MSN: 529650036
Fatalities:Fatalities: 1 / Occupants: 1
Aircraft damage: Destroyed
Location:near Ilsky, Krasnodar Region -   Russia
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Departure airport:
Destination airport:
Investigating agency: MAK
Confidence Rating: Accident investigation report completed and information captured
The helicopter crashed near Ilsky, Krasnodar Region, during an aerial application flight.
The pilot was killed.

The accident with the Mi-2 RA-20977 helicopter was caused by the separation of the tail rotor blade in flight at low altitude, which led to its imbalance with the separation of the tail gear, loss of directional control and imbalance of the aircraft, uncontrolled rotation with loss of altitude and subsequent collision of the helicopter with terrain. The separation of the blade in flight occurred as a result of fatigue failure of the torsion bar attaching the blade to the tail rotor hub during its operation with corrosion damage.

Contributing factors:
- failure to perform a major overhaul of the tail rotor in the factory, the record in the passport of the tail rotor about the overhaul was falsified;
- the use of a set of tail rotor blades with an expired service life in 1995, the passport of the set of blades was falsified;
- the absence of mandatory procedures for verifying the authenticity of aircraft components during the certification of an instance, which did not allow identifying these shortcomings.

Deficiencies identified during the investigation:
- in violation of the requirements of paragraph 7. FAP MO GA-2002, PIC did not have a valid medical certificate;
- in violation of the requirements of clause 2.22. FAP-147, the PIC performed the functions of an aircraft commander without a qualification check;
- in violation of paragraph 54. FAR-285 and clause 2. Appendix No. 1 of FAP-132, the overhaul of the cold water was not completed in a timely manner;
- in violation of paragraph 2. of Appendix No. 1 of FAP-132, the aircraft component (set of blades of the cold wind) did not have the rest of the service life.

Accident investigation:
Investigating agency: MAK
Report number: 
Status: Investigation completed
Duration: 1 year 1 month
Download report: Final report


See also:


Photo: EMERCOM of Russia

Revision history:

17-Apr-2021 16:59 harro Added
17-Apr-2021 17:01 harro Updated [Source, Photo]
17-Apr-2021 17:06 harro Updated [Registration, Cn, Source]
17-Apr-2021 19:24 RobertMB Updated [Time, Source, Narrative]
22-Apr-2021 18:14 aaronwk Updated [Narrative]
24-May-2022 15:31 harro Updated [Operator, Phase, Narrative, Accident report]
27-Jun-2022 14:45 Hirurg Updated [Time]
09-Nov-2022 08:44 Hans Gruber Updated [Source, Damage]

Corrections or additions? ... Edit this accident description

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