ASN Wikibase Occurrence # 59886
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| Date: | Thursday 7 May 2009 |
| Time: | 08:00 |
| Type: |  Robinson R22 Beta |
| Owner/operator: | November Alpha LLC |
| Registration: | N456SH |
| MSN: | 4027 |
| Year of manufacture: | 2006 |
| Total airframe hrs: | 2480 hours |
| Engine model: | Lycoming O-360-J2A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Winter Haven, FL -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Winter Haven’s Gilbert Airport, FL (GIF/KGIF) |
| Winter Haven’s Gilbert Airport, FL (GIF/KGIF) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On May 7, 2009, about 08:00 EDT (Eastern Daylight Time), a Robinson R22 Beta, N456SH, registered to November Alpha LLC, operated by a private individual, was landed hard during an autorotative landing near Winter Haven, Florida. Visual meteorological conditions prevailed at the time and no flight plan was filed for the 14 Code of Federal Regulations (CFR) Part 91 personal flight from Winter Haven’s Gilbert Airport (GIF), Winter Haven, Florida. The helicopter was substantially damaged and the certificated private pilot was not injured. The flight originated from GIF about 07:45 EDT.
The pilot stated that after takeoff he remained in the traffic pattern for runway 11 and executed practice autorotative landings with a power recovery. During the downwind leg for another practice autorotative landing while flying at 600 to 625 feet mean sea level with the governor on, he applied carburetor heat and five seconds later he perceived by sound that the engine quit. He turned onto base leg, and attempted to restart the engine but allowed the main rotor rpm to decrease to 87 percent. He stopped his restart attempts and initiated descent for an autorotative landing. He maintained 65 knots during the descent and when the flight was at 40 feet with obstacles ahead (mobile homes), he intentionally slowed the helicopter. At 20 feet above ground level he pulled collective which activated the main rotor rpm warning and resulted in a hard landing.
Examination of the accident site by a Federal Aviation Administration (FAA) airworthiness inspector revealed the helicopter landed 100 yards short of the mobile homes. A portion of the tail boom was separated and the main rotor blades were bent and wrinkled. The throttle, mixture, and carburettor heat control rigging was found to be correct. The fuel gascolator and bowl were clean.
Following recovery of the helicopter with the main rotor blades removed, an FAA inspector observed the engine start and operate to idle rpm.
According to a FAA Special Airworthiness Information Bulletin, based on the temperature and dew point (75 and 66 degrees Fahrenheit respectively), the conditions were favorable for serious carburettor icing while at glide power.
Probable Cause: A loss of engine power for undetermined reasons.
Accident investigation:
 |
|
Sources:
NTSB
2. FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=456SH
3. http://helihub.com/2009/05/07/7-may-09-n456sh-robinson-r22-winter-park-us-florida/
4. http://www.avclaims.com/N456SH.html
5. Photos of wreckage http://www.avclaims.com/N456SH%20Photos2.htm
6. http://www.avclaims.com/N456SH%20Photos.htm
7. http://www.avclaims.com/N456SH%20Photos3.htm
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-May-2009 08:59 | slowkid | Added |
| 08-May-2009 09:09 | slowkid | Updated |
| 01-Oct-2016 19:31 | Dr.John Smith | Updated [Time, Operator, Location, Phase, Departure airport, Source, Narrative] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 02-Dec-2017 14:54 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
| 26-Sep-2018 20:28 | Dr.John Smith | Updated [Time, Operator, Other fatalities, Location, Departure airport, Destination airport, Source, Narrative] |
| 26-Feb-2022 00:09 | Captain Adam | Updated [Location, Departure airport, Destination airport, Source] |
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