ASN Wikibase Occurrence # 132874
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| Date: | Thursday 8 September 1994 |
| Time: | 11:43 LT |
| Type: |  Eurocopter AS 350B2 |
| Owner/operator: | Kusa Tv |
| Registration: | N99TV |
| MSN: | 2666 |
| Year of manufacture: | 1992 |
| Total airframe hrs: | 840 hours |
| Engine model: | TURBOMECA Arriel 1D1 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Cascade, El Paso County, CO -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Executive |
| Departure airport: | |
| Denver, CO (CO88) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
SHORTLY AFTER TAKEOFF FROM ATOP PIKES PEAK, THE ENGINE LOST POWER AND THE PILOT AUTOROTATED STRAIGHT AHEAD. THE HELICOPTER COLLIDED WITH TREES AND ROLLED OVER. FUEL SAMPLES CONTAINED VISIBLE CONTAMINANTS AND THE FUEL CONTROL UNIT (FCU) WAS UNABLE TO ATTAIN TARGET FUEL FLOW DURING POST ACCIDENT TESTING. THE CONTAMINANTS WERE IDENTIFIED AS FILTER MATERIAL AND PARTICLES OF METAL, GLASS, SAND, AND PLASTIC. METALLIC PARTICLES WERE IDENTIFIED AS BEING COPPER, IRON, NICKEL, AND CHROMIUM. FCU DISASSEMBLY REVEALED A CLOGGED AMPLIFIER PISTON FILTER, A SCORED ISOCHRONOUS PISTON, AND A COLLAPSED TEMPERATURE COMPENSATOR. ACCORDING TO THE ENGINE MANUFACTURER, THE FUEL CONTAMINANTS COULD DISTURB FCU OPERATION AND THE SCORED PISTON WAS 'EVIDENCE OF AN OPERATION WITH POLLUTED FUEL.' THE SOURCE OF CONTAMINANTS WAS NOT DETERMINED. NO REPORTS OF FUEL CONTAMINATION WERE RECEIVED FROM OTHER PILOTS USING THE SAME FUEL VENDOR.
Probable Cause: A POWER LOSS DUE TO CONTAMINATED FUEL FROM AN UNKNOWN SOURCE THAT CLOGGED THE FUEL FILTER AND INTERNALLY DAMAGED THE FUEL CONTROL UNIT. A FACTOR WAS UNSUITABLE TERRAIN FOR A FORCED LANDING.
Accident investigation:
 |
|
Sources:
NTSB FTW94FA293
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=99TV
History of this aircraft
Other occurrences involving this aircraft
| 13 September 2014 | N197BH | Hawaii Helicopters Inc. | 0 | Kahului , Maui, HI | |
sub |
| CFIT | ||||||
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Jul-2014 22:21 | Dr. John Smith | Updated [Time, Operator, Location, Departure airport, Destination airport, Source, Narrative] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 24-Jun-2023 00:51 | Ron Averes | Updated [[Time, Damage, Category, Investigating agency]] |
| 09-Apr-2024 19:23 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
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