ASN Wikibase Occurrence # 39343
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Date: | Monday 12 August 1985 |
Time: | 19:30 |
Type: | Ronald Houk RD-1 |
Owner/operator: | private |
Registration: | N4741A |
MSN: | 100 |
Total airframe hrs: | 2 hours |
Engine model: | LYCOMING O-290-G |
Fatalities: | Fatalities: 1 / Occupants: 1 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | St. Charles, MO -
United States of America
|
Phase: | En route |
Nature: | Private |
Departure airport: | |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:THE HOME BUILT GYROCOPTER WAS BEING FLOWN BY THE OWNER/BUILDER/DESIGNER WHO HAD AN AIRPLANE, SINGLE-ENG, LAND RATING. SHORTLY AFTER THE GYROCOPTER TOOK OFF, THE ENG WAS OPERATING AT A HIGH RPM WHEN A WITNESS HEARD A POP/NOISE. SUBSEQUENTLY, THE GYROCOPTER CRASHED IN A CORN FIELD ABOUT 1-1/2 MI FROM THE DEPARTURE POINT. THE MAIN WRECKAGE WAS FOUND INVERTED. ONE ROTOR BLADE, THE OIL COOLER & THE LEFT VERTICAL STABILIZER & RUDDER WERE FOUND 60 TO 150 FT FROM THE MAIN WRECKAGE. BOTH OF THE WOODEN PROP BLADES HAD SHATTERED. THE OIL COOLER HAD BEEN INSTALLED BELOW THE ENG & JUST FORWARD OF THE PROP. ITS UPPER SIDE HAD BEEN ATTACHED WITH A SINGLE SOLID MOUNT USING AN 'L' SHAPED ALUMINUM STRAP. ITS LOWER SIDE WAS FASTENED WITH A SEMIFLEXIBLE MOUNTING. THERE WAS EVIDENCE THAT THE UPPER MOUNT HAD FAILED & ALLOWED THE OIL COOLER TO MOVE AFT INTO THE PLANE OF ROTATION OF THE PROP BLADES. EXCEPT FOR THE OIL COOLER BRACKET, NO PRE- ACCIDENT MECHANICAL PROBLEMS WERE FOUND. CAUSE:
Sources:
NTSB:
https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001214X37580 Revision history:
Date/time | Contributor | Updates |
24-Oct-2008 10:30 |
ASN archive |
Added |
21-Dec-2016 19:23 |
ASN Update Bot |
Updated [Time, Damage, Category, Investigating agency] |
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