ASN Wikibase Occurrence # 361583
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Friday 30 July 1993 |
| Time: | 13:29 LT |
| Type: |  Robinson R-22 |
| Owner/operator: | Helicopter Adventures, Inc. |
| Registration: | N549SM |
| MSN: | 1549 |
| Year of manufacture: | 1990 |
| Total airframe hrs: | 1795 hours |
| Engine model: | LYCOMING O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Verdi, NV -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Training |
| Departure airport: | Reno, NV (KRNO) |
| Truckee, CA (KTRK) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER WAS ONE OF A FLIGHT OF FOUR HELICOPTERS CONDUCTING A MOUNTAIN FLYING COURSE WHICH CONSISTED OF EXECUTING PINNACLE LANDINGS AND TAKEOFFS. THE CFI ALLOWED THE DUAL STUDENT TO FOLLOW ANOTHER HELICOPTER ON ITS DEPARTURE FROM THE PINNACLE. THE HELICOPTER ENCOUNTERED THE PRECEDING HELICOPTER'S ROTOR WASH AND IMMEDIATELY TURNED RIGHT. THE STUDENT APPLIED LEFT PEDAL CORRECTIVE ACTION, BUT THE MAIN ROTOR RPM'S BEGAN TO DECAY. THE CFI ASSUMED THE CONTROLS AND IMMEDIATELY LOWERED THE COLLECTIVE AND APPLIED FULL THROTTLE, BUT THE REAR SKIDS STRUCK THE GROUND. THE CFI WAS ABLE TO REGAIN A LEVEL ATTITUDE, BUT THE HELICOPTER STRUCK SOME ROCKS AND CRASHED.
Probable Cause: THE INSTRUCTOR'S IMPROPER SUPERVISION OF THE FLIGHT; THE DUAL STUDENT'S IMPROPER IN-FLIGHT DECISION TO FOLLOW ANOTHER HELICOPTER ON DEPARTURE AND THE DUAL STUDENTS DELAY IN CORRECTING THE INADVERTENT YAW. FACTORS RELATED TO THIS ACCIDENT WAS THE INADVERTENT ENCOUNTER WITH THE WAKE TURBULENCE FROM THE PRECEDING DEPARTING HELICOPTER; THE DUAL STUDENT'S IMPROPER USE OF THE THROTTLE AND THE DUAL STUDENTS FAILURE TO MAINTAIN ADEQUATE ROTOR RPM.
Accident investigation:
 |
|
Sources:
NTSB LAX93LA308
History of this aircraft
Other occurrences involving this aircraft
| 1 November 1991 | N549SM | Parflite, Inc. | 0 | Riverside, CA | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Mar-2024 20:00 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation