- Date
- August 27, 2005, 14:45 local (20:45 UTC)
- Place
- Boise, ID
- Injuries
- 2 minor
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N845SHRobinson R22 Beta
- Weather
- Visual (VMC) · Day
- Status
- Completed · report December 20, 2005
- Report
- Approved by Office Director
- FAA report
- 20050827018609A
- Case key
- 62347
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
Inadequate communications between the certified flight instructor and student pilot, and the student pilot's delay in relinquishing controls resulting in a hard landing during a practice autorotation.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The instructor pilot reported that he and the student pilot were practicing power recovery autorotations at the Boise airport. During the tenth practice autorotation, with the student pilot on the controls, the instructor noted a lower than normal main rotor RPM (approximately 94 percent) and elected to take the controls in an effort to make the necessary inputs to recover from the maneuver. The instructor pilot reported that during the transition (approximately 60 feet agl), there was a "struggle" for the controls and corrective action was delayed resulting in a hard landing and substantial damage to the helicopter. The instructor pilot stated that he does not recall verbalizing the transfer of control to the student pilot.
Factual narrative
On August 27, 2005, about 1445 mountain daylight time, a Robinson R22 Beta helicopter, N3825, sustained substantial damage subsequent to a hard landing following a practice autorotation at the Boise Air Terminal, Boise, Idaho. The helicopter is owned by Silver State Helicopters of North Las Vegas, and was being operated as a visual flight rules (VFR) instructional flight under Title 14 CFR Part 91, when the accident occurred. The certified flight instructor, and student pilot receiving helicopter training, were not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the local instructional flight. The flight originated from Boise, Idaho, approximately one hour prior to the accident.
In a written statement dated August 27, 2005, and subsequent telephone conversation with the NTSB IIC, the instructor pilot reported he and the student pilot were practicing power recovery autorotations at the Boise airport. During the tenth practice autorotation, with the student pilot on the controls, the instructor noted a lower than normal main rotor RPM (approximately 94 percent) and elected to take the controls in an effort to make the necessary inputs to recover from the maneuver. The instructor pilot reported that during the transition (approximately 60 feet agl), there was a "struggle" for the controls and corrective action was delayed resulting in a hard landing and substantial damage to the helicopter.
The instructor pilot stated that he does not recall verbalizing the transfer of control to the student pilot.
Aircraft
- Registration
- N845SH
- Reported as
- Robinson R22 Beta
- Category
- Helicopter
- Serial number
- 3825
- Engine
- Lycoming O-360-J2A, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Registered owner
- Silver State Helicopters, LLC
- Airworthiness certificate
- Standard, Normal
- Departed
- BOI · Boise, ID
- Destination
- BOI · Boise, ID
- Airport
- BOI · Boise Air Terminal /Gowen Fld/, runway 27
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 30
- Certificates
- Commercial, Flight instructor
- Airplane ratings
- Single-engine land
- Medical
- Class 2
- Flight hours
- 506 total · 444 in this make and model
- Role
- Student pilot
- Age
- 36
- Certificate
- Student
- Medical
- Class 2
Weather
- Conditions
- Visual (VMC) · Day
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.