- Date
- May 25, 2014, 10:30 local (14:30 UTC)
- Place
- Constantine, MI
- Injuries
- 3 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N365WMAerospatiale AS 365 N2 Dauphin
- Defining event
- Landing-flare/touchdown: Settling with power/vortex ring state
- Weather
- Visual (VMC) · Day
- Status
- Completed · report June 18, 2014
- Report
- Approved by Office Director
- NTSB office
- Central Region
- FAA report
- 20140525006799A
- Case key
- 89279
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
The pilot's loss of control while entering a vortex ring state (settling with power) condition, which resulted in a hard landing.
Findings · 2
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
Analysis
The pilot reported that he positioned the helicopter to land on a westerly heading with the light and variable wind from the west. About 200 feet above the ground he noticed that the helicopter was descending so he increased the collective to arrest the rate of descent. The torque gage was increasing from 50% to 60%. He lowered the collective in attempt to get into clean air and then pulled back on the cyclic to arrest the forward airspeed. The pilot attempted to control the helicopter to the ground, maintain an upright attitude, and avoid obstacles. The helicopter landed hard and bounced once before it came to rest in the parking lot. The pilot reported no preaccident mechanical malfunctions or failures with the helicopter that would have precluded normal operation. A video of the accident sequence was reviewed and matched the pilot's statement. The video did not reveal any anomalies with the helicopter or the engine sounds. A postaccident examination revealed substantial damage to the right fuselage and lower right vertical stabilizer. The video evidence and pilot statement are consistent with the helicopter entering a vortex ring state (settling with power) condition, which allowed the helicopter to descend more rapidly than expected and land hard.
Factual narrative
The pilot reported that he positioned the helicopter to land on a westerly heading with the light and variable wind from the west. About 200 feet above the ground he noticed that the helicopter was descending so he increased the collective to arrest the rate of descent. The torque gage was increasing from 50% to 60%. He lowered the collective in attempt to get into clean air and then pulled back on the cyclic to arrest the forward airspeed. The helicopter continued to descend quickly so the pilot attempted to control the helicopter to the ground, maintain an upright attitude, and avoid obstacles. The helicopter landed hard and bounced once before it came to rest in the parking lot. The pilot reported no preaccident mechanical malfunctions or failures with the helicopter that would have precluded normal operation. A video of the accident sequence was reviewed. The video captured the helicopter as it approached the landing zone, made a right descending turn and then hover taxied over the landing zone. As the helicopter continued to descend, the rate of descent increased. The helicopter continued to the ground where it landed hard and bounced one time. It came to rest upright in the parking lot. The video did not reveal any anomalies with the helicopter or engine sounds. A postaccident examination revealed substantial damage to the right fuselage and lower right vertical stabilizer.
Aircraft
- Registration
- N365WM
- Reported as
- Aerospatiale AS 365 N2 Dauphin
- Category
- Helicopter
- Serial number
- 6429
- Built
- 1991
- Airframe hours
- 6,782
- Engines
- Turbomeca Arriel 1C2, 738 horsepower, turbo shaftTurbomeca Arriel 1C2, 738 horsepower, turbo shaft
- Damage
- Substantial damage
- Flight
- Positioning · Part 91
- Operator
- West Michigan Air Care Inc
- Registered owner
- West Michigan Air Care
- Airworthiness certificate
- Standard, Transport
- Last inspection
- AAIP · March 6, 2014 · 46 hours before
- Departed
- 9MI9 · Kalamazoo, MI
- Destination
- Constantine, MI
- Flight plan
- VFR
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
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 31
- Injuries
- None
- Certificate
- Commercial
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane, Helicopter
- Medical
- Class 2, Without waivers/limitations
- Last flight review
- April 10, 2014
- Seat
- Right
- Restraint
- 5-point
- Flight hours
- 2,268 total · 130 in this make and model · 1,286 as pilot in command · 56 in the last 90 days · 25 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 170° at 3 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 73 °F, dew point 55 °F
- Altimeter
- 30.17 inHg
- Observed at
- KHAI, 8 nm away
Docket · 4
The files NTSB released with the investigation on June 11, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.6 MB in all.
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.