ASN Wikibase Occurrence # 357071
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Date: | Thursday 11 July 1996 |
Time: | 17:30 LT |
Type: | Bell 206B |
Owner/operator: | Scenic Helicopter Rides, Ltd |
Registration: | N999TV |
MSN: | 184 |
Year of manufacture: | 1967 |
Total airframe hrs: | 14948 hours |
Engine model: | Allison 250-C20 |
Fatalities: | Fatalities: 0 / Occupants: 5 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Pigeon Forge, TN -
United States of America
|
Phase: | En route |
Nature: | Unknown |
Departure airport: | |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:The helicopter was refueled before flight. About 1 minute after takeoff, at about 500 feet agl, the engine lost power. The pilot enter an autorotation and established a glide to a field ahead. As he approached the field, he pull up the collective to clear a house and a ditch. Subsequently, the main rotor rpm decreased and the helicopter touched down hard. Postcrash examination of the helicopter revealed the engine PC air line had separated near the attaching nut on the compressor scroll end. Metallurgical examination showed the tube had separated due to fatigue cracking, which was induced by installation damage. No other preaccident failure or malfunction of the engine, helicopter structure, or flight controls was found. Allison Engine Company representatives stated the engine would go to minimum fuel flow after separation of the PC line.
Probable Cause: fatigue failure of the engine PC line, induced by damage from improper installation, which resulted in a loss of engine power and an autorotative landing to unsuitable terrain.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | MIA96LA180 |
Status: | Investigation completed |
Duration: | 5 months |
Download report: | Final report |
|
Sources:
NTSB MIA96LA180
Location
Revision history:
Date/time | Contributor | Updates |
13-Mar-2024 13:52 |
ASN Update Bot |
Added |
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