- Date
- December 9, 2015, 08:40 local (13:40 UTC)
- Place
- West Palm Beach, FL
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N4427HRobinson Helicopter R44
- Defining event
- Landing: Loss of control in flight
- Weather
- Visual (VMC) · Day
- Status
- Completed · report March 14, 2016
- Report
- Approved by Office Director
- NTSB office
- General Aviation Accidents
- Parties
- FAA South Florida FSDO
- FAA report
- 20151209020469I
- Case key
- 92426
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 student pilot's failure to maintain directional control during the landing, which resulted in a horizontal rotation of the helicopter, and abnormal runway contact.
Findings · 3
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 solo student helicopter pilot reported that he conducted eight traffic pattern flights to a full stop on the runway. On his ninth approach, he was at the bottom of the landing transitioning to a hover, and he increased power while simultaneously applying left pedal. He reported that as he entered the hover his airspeed was "close to 5 knots or less" and his altitude was "approximately 5 to 10 feet above ground level," the helicopter began to rapidly yaw to the right, he applied full left pedal, and the helicopter rotated "approximately 450 to 460 degrees." The student pilot reported that the helicopter began to "wobble," he lowered the collective to land, the helicopter bounced once, and then skidded to a stop. A postflight inspection revealed substantial damage to the fuselage and tail boom. The student pilot reported there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. The student pilot reported that the wind was 060 degrees at 3 knots at the accident airport, approximately one hour prior to the accident time. The closest weather reporting station to the accident airport is 12 nautical miles away, and reported that the wind was calm approximately 13 minutes after the accident time.
Factual narrative
The solo student helicopter pilot reported that he conducted eight traffic pattern flights to a full stop on the runway. On his ninth approach, he was at the bottom of the landing transitioning to a hover, and he increased power while simultaneously applying left pedal. He reported that as he entered the hover his airspeed was "close to 5 knots or less" and his altitude was "approximately 5 to 10 feet above ground level," the helicopter began to rapidly yaw to the right, he applied full left pedal, and the helicopter rotated "approximately 450 to 460 degrees." The student pilot reported that the helicopter began to "wobble," he lowered the collective to land, the helicopter bounced once, and then skidded to a stop. A postflight inspection revealed substantial damage to the fuselage and tail boom. The student pilot reported there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. The student pilot reported that the wind was 060 degrees at 3 knots at the accident airport, approximately one hour prior to the accident time. The closest weather reporting station to the accident airport is 12 nautical miles away, and reported that the wind was calm approximately 13 minutes after the accident time.
Aircraft
- Registration
- N4427H
- Reported as
- Robinson Helicopter R44 (UNDESIGNAT)
- Category
- Helicopter
- Serial number
- 0923
- Built
- 2000
- Airframe hours
- 1,587.6
- Engine
- Lycoming O-540F1, 225 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · September 19, 2015
- Departed
- F45 · West Palm Beach, FL
- Destination
- F45 · West Palm Beach, FL
- Airport
- F45 · North Palm Beach County Genera, runway 08L, 3,679 × 75 ft, grass/turf
- Equipment
- None
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
- Student pilot
- Age
- 48
- Injuries
- None
- Certificates
- Student, Private
- Airplane ratings
- Single-engine land
- Medical
- Class 2, With waivers/limitations
- Seat
- Front
- Restraint
- 3-point
- Flight hours
- 126 total · 27 in this make and model · 22 as pilot in command · 56 in the last 90 days · 23 in the last 30 days · 3 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 10 statute miles
- Temperature
- 75 °F, dew point 70 °F
- Altimeter
- 30.02 inHg
- Observed at
- KPBI, 12 nm away
Docket · 3
The files NTSB released with the investigation on March 8, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.2 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.