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| Date: | Wednesday 20 January 1988 |
| Time: | 17:10 |
| Type: |  Aérospatiale AS 350B |
| Owner/operator: | Rocky Mountain Helicopters Inc |
| Registration: | N26TM |
| MSN: | 1644 |
| Total airframe hrs: | 2262 hours |
| Engine model: | TURBOMECA ARRIEL 1B |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Gemini Heliport, Omaha, Nebraska -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Ferry/positioning |
| Departure airport: | Gemini Heliport, Omaha, Nebraska (NE46) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Information is only available from news, social media or unofficial sources |
THE PILOT PICKED THE AIRCRAFT UP TO A HOVER AND MADE A HOVERING TURN IN PREPARATION FOR DEPARTURE. THE NOSE OF THE AIRCRAFT BEGAN TO RISE. THE PILOT STATED LATER THAT HE COULD NOT CONTROL THE AIRCRAFT. THE AIRCRAFT BEGAN TO DESCEND AND THE TAIL ROTOR STRUCK A SECURITY FENCE AROUND THE HELIPORT. THE MAIN ROTOR THEN STRUCK A WINDSOCK POLE, A TREE, A LIGHT POLE, AND A CONCRETE BENCH DURING THE ACCIDENT SEQUENCE.
THE ACCOMPLISHMENT OF THE MANUFACTURER'S SERVICE BULLETIN (SB) #67-05 HAD BEEN PARTIALLY COMPLETED. THE SB PROVIDED FOR PROTECTION AGAINST ICE IN THE HYDRAULIC SERVO BY INSTALLATION OF PROTECTIVE COVERS. THE PROTECTIVE COVERS HAD BEEN INSTALLED TO PROTECT THE OTHER TWO MAIN ROTOR SERVOS BUT NOT THE SERVO WHICH CONTROLLED FORE AND AFT CYCLIC CONTROL.
THE OMAHA AREA EXPERIENCED FREEZING PRECIPITATION THE NIGHT BEFORE THE ACCIDENT,THE TEMPERATURE HAD NOT RISEN ABOVE FREEZING DURING THE DAY, AND FREEZING PRECIPITATION WAS FORECAST.THIS WAS THE FIRST FLIGHT OF THE DAY FOR THIS AIRCRAFT
Sources:
1. NTSB: https://www.ntsb.gov/aviationquery/brief.aspx?ev_id=20001213X24963&key=1
2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=26tm
3. [LINK NOT WORKING ANYMORE:http://coptercrazy.brinkster.net/search/se350show.asp?start=601&count=50]
4. http://www.griffin-helicopters.co.uk/accidentdetails.aspx?accidentkey=11568
5. http://aircrashed.com/accident/MKC88FA043.shtml
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 29-Jun-2014 03:54 | Dr. John Smith | Updated [Time, Location, Phase, Departure airport, Source, Narrative] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
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