ASN Wikibase Occurrence # 216120
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| Date: | Sunday 7 October 2018 |
| Time: | 13:40 |
| Type: |  Enstrom F-28C |
| Owner/operator: | J |
| Registration: | N5691Y |
| MSN: | 479-2 |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 5462 hours |
| Engine model: | Lycoming HIO-360-E1AD |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Bridgeville, Sussex County, DE -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Survey |
| Departure airport: | Bridgeville, DE |
| Bridgeville, DE | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The commercial pilot had performed numerous local sightseeing helicopter flights the day of the accident. During the accident flight lift off from the field with power lines and farm equipment nearby, the pilot increased the throttle to the maximum engine and rotor rpm and began a climbing left turn toward power lines, during which he noticed the rotor rpm slowing. He slightly decreased collective pitch and further increased the throttle, but the rotor rpm did not increase. The pilot then increased collective pitch even farther as the helicopter cleared the power lines, which exacerbated the low rotor rpm state and was contrary to guidance published in the helicopter's pilot's operating handbook. The pilot's power management allowed the rotor rpm to decay below a point at which sustained flight was possible. Subsequently, the helicopter descended and impacted an open field hard, which resulted in substantial damage to the tailboom and tail rotor. The pilot did not report any preimpact mechanical malfunctions or failures with the helicopter, which was confirmed by a postaccident examination and test run of the helicopter's engine. The pilot’s mismanagement of collective pitch control led to the helicopter entering a low rotor rpm state and its subsequent inability to maintain flight.
Probable Cause: The pilot's mismanagement of collective pitch control during takeoff from an area with numerous obstacles, which resulted in the helicopter entering a low rotor rpm state and a forced hard landing.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: https://registry.faa.gov/AircraftInquiry/NNum_Results.aspx?NNumbertxt=5691Y
History of this aircraft
Other occurrences involving this aircraft
| 17 October 1985 | N5691Y | Spectrum Helicopters,inc. | 0 | Linden, NJ | |
sub |
Location
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 07-Oct-2018 22:40 | Geno | Added |
| 08-Oct-2018 02:58 | Geno | Updated [Aircraft type, Registration, Cn, Source] |
| 08-Oct-2018 18:26 | Iceman 29 | Updated [Source, Embed code] |
| 08-Oct-2018 20:44 | Aerossurance | Updated [Time, Phase, Nature, Narrative, Plane category] |
| 10-Oct-2018 15:55 | Anon. | Updated [Aircraft type, Registration] |
| 10-Oct-2018 15:56 | harro | Updated [Cn, Source] |
| 27-Nov-2019 07:17 | ASN Update Bot | Updated [Time, Operator, Nature, Departure airport, Destination airport, Source, Narrative, Accident report, ] |
Corrections or additions? ... Edit this accident description
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