ERA15CA089

NTSB accident investigation · Robinson Helicopter R44 II · Barranquitas, PR · January 2, 2015

Accident · Minor injuriesData collectionFinal report
Date
January 2, 2015, 16:40 local (20:40 UTC)
Place
Barranquitas, PR
Injuries
1 minor, 2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N3183TRobinson Helicopter R44 II
Defining event
Landing: Tailstrike
Weather
Visual (VMC) · Day
Status
Completed · report June 1, 2015
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA / FSDO
FAA report
20150102001609A
Case key
90559

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 failure to maintain control of the helicopter while landing which resulted in a tailrotor ground strike and collision with terrain.

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

After renting the helicopter from a flight school, the pilot took off and flew to a nearby town where he picked up two passengers. He then flew them to another town to attend a party. During the flights everything was normal. Upon arrival at their destination, the pilot began to circle and asked one of the passengers to call a friend who was on the ground on his cell phone, to check the landing area to make sure it was clear for him to land. After the pilot was told it was "clear for landing," he started a smooth descent "with all of the instruments in the green arc," to the landing area which was located on a dirt road on the ridge of a mountain. The landing was smooth and the pilot touched down lightly on the skids. While the helicopter had not fully set down and was still light on the skids, he began to check the "balance of the helicopter" before setting the collective to the full down position. When he moved the cyclic forward, the helicopter pitched forward. Then when he moved the cyclic aft to its previous position, the helicopter pitched aft and he heard a "big noise" and felt a vibration. He immediately "pulled" collective and rolled the throttle to the full throttle position to get the helicopter back into the air but, the helicopter started to spin clockwise and he could not stop the rotation, even with the application of full left pedal. He then leveled the helicopter while it was still spinning and tried to make it back to the landing site but, there was not enough power to keep it airborne. The left skid then contacted the ground and the helicopter rolled over on to its left side. Postaccident examination of the helicopter by a Federal Aviation Administration inspector revealed that the tail rotor assembly and tail boom were substantially damaged.

Factual narrative

After renting the helicopter from a flight school, the pilot took off and flew to a nearby town where he picked up two passengers. He then flew them to another town to attend a party. During the flights everything was normal. Upon arrival at their destination, the pilot began to circle and asked one of the passengers to call a friend who was on the ground on his cell phone, to check the landing area to make sure it was clear for him to land. After the pilot was told it was "clear for landing," he started a smooth descent "with all of the instruments in the green arc," to the landing area which was located on a dirt road on the ridge of a mountain. The landing was smooth and the pilot touched down lightly on the skids. While the helicopter had not fully set down and was still light on the skids, he began to check the "balance of the helicopter" before setting the collective to the full down position. When he moved the cyclic forward, the helicopter pitched forward. Then when he moved the cyclic aft to its previous position, the helicopter pitched aft and he heard a "big noise" and felt a vibration. He immediately "pulled" collective and rolled the throttle to the full throttle position to get the helicopter back into the air but, the helicopter started to spin clockwise and he could not stop the rotation, even with the application of full left pedal. He then leveled the helicopter while it was still spinning and tried to make it back to the landing site but, there was not enough power to keep it airborne. The left skid then contacted the ground and the helicopter rolled over on to its left side. Postaccident examination of the helicopter by a Federal Aviation Administration inspector revealed that the tail rotor assembly and tail boom were substantially damaged.

Aircraft

Registration
N3183T
Reported as
Robinson Helicopter R44 II
Category
Helicopter
Serial number
11550
Built
2007
Airframe hours
451.1
Engine
Lycoming IO-540-AE1A5, 245 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 8, 2014 · 1 hours before
Departed
NONE · Vega Baja, PR
Destination
NONE · Barranquitas, PR
Airport
NONE · Ridge Line

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
50
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
March 17, 2013
Seat
Right
Restraint
3-point
Flight hours
583 total · 36 in this make and model · 504 as pilot in command · 62 in the last 90 days · 1 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
70° at 13 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 72 °F
Altimeter
30.12 inHg
Observed at
TJSJ, 24 nm away

Docket · 8

The files NTSB released with the investigation on May 15, 2015, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.4 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.