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ASN Wikibase Occurrence # 204885
Last updated: 21 January 2019
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Type:Silhouette image of generic G2CA model; specific model in this crash may look slightly different
Guimbal Cabri G2
Owner/operator:D H Helicopter Inc.
Registration: N989HH
C/n / msn: 1124
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:St. Louis Downtown Airport (KCPS), Cahokia/St Louis, IL -   United States of America
Phase: Approach
Departure airport:Cahokia, IL (CPS)
Destination airport:Cahokia, IL (CPS)
Investigating agency: NTSB
The helicopter flight instructor reported that the student pilot was performing a normal approach to a hover with a quartering gusting headwind. He added that he “reminded” the student of the need to anticipate right pedal input as they applied power to terminate to a hover. Subsequently, the student pilot did not add sufficient “right pedal,” and the helicopter immediately and very rapidly yawed to the left. The flight instructor said, “my controls,” and attempted to recover, but the helicopter continued to spin counterclockwise, touched down, and then rolled onto its right side.
The helicopter sustained substantial damage to the fuselage and main rotor system.
The flight instructor and student reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.
The automated weather observation system on the airport reported that, about the time of the accident, the wind was from 170° at 11 knots, gusting to 22 knots. The student pilot attempted to hover on runway 12L.

Probable Cause: The student pilot’s failure to maintain yaw control while landing in gusting crosswind conditions and the flight instructor’s delayed remedial action.


FAA register:

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 3 months
Download report: Final report


Photo: FAA

Revision history:

22-Jan-2018 20:03 Iceman 29 Added
22-Jan-2018 20:05 Iceman 29 Updated [Date, Embed code]
22-Jan-2018 20:54 Geno Updated [Time, Aircraft type, Operator, Location, Departure airport, Destination airport, Source, Damage, Narrative]
23-Jan-2018 17:24 Terry Updated [Registration, Cn, Source]
24-Jan-2018 03:17 Geno Updated [Date, Source]
01-May-2018 13:43 ASN Update Bot Updated [Time, Operator, Departure airport, Destination airport, Source, Embed code, Narrative]
01-May-2018 14:05 harro Updated [Operator, Phase, Source, Narrative, Photo, ]

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