ASN Wikibase Occurrence # 352801
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Date: | Monday 16 August 1999 |
Time: | 16:37 LT |
Type: | Robinson R-22 |
Owner/operator: | Northern Lights Helicopters |
Registration: | N20879 |
MSN: | 1442 |
Year of manufacture: | 1990 |
Total airframe hrs: | 1132 hours |
Engine model: | Lycoming O-320 |
Fatalities: | Fatalities: 0 / Occupants: 1 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Mansfield, MA -
United States of America
|
Phase: | Take off |
Nature: | Training |
Departure airport: | (1B9) |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:With his instructor outside the helicopter watching, the student pilot attempted to bring the helicopter to a hover. With the left skid in the air and the entire right skid on the ground, the helicopter rolled over. No pre-impact failures or malfunctions were found. Federal Aviation Administration Advisory Circular 90-87 (Helicopter Dynamic Rollover) states the following; 'During normal or slope takeoffs and landings with...one skid/wheel on the ground, the bank angle or side drift can place the helicopter in a situation where it is pivoting (rolling) about a skid/wheel which is still in contact with the ground....if a roll rate is permitted to develop, a critical bank angle...may be reached where roll cannot be corrected, even with full lateral cyclic.' The student pilot had logged a total of 27 hours of flight experience with all 27 hours in helicopters.
Probable Cause: Was the student pilot's failure to maintain lateral control of the helicopter while bringing it to a hover. A factor in the accident was the student pilot's lack of total experience in helicopters.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | NYC99LA204 |
Status: | Investigation completed |
Duration: | 1 year and 3 months |
Download report: | Final report |
|
Sources:
NTSB NYC99LA204
Revision history:
Date/time | Contributor | Updates |
08-Mar-2024 20:01 |
ASN Update Bot |
Added |
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