CEN14CA360

NTSB accident investigation · Robinson Helicopter R44 II · Englewood, CO · July 11, 2014

Accident · No injuriesData collectionFinal report
Date
July 11, 2014, 07:15 local (13:15 UTC)
Place
Englewood, CO
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N69MPRobinson Helicopter R44 II
Defining event
Maneuvering-hover: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed · report September 24, 2014
Report
Approved by Office Director
NTSB office
Central Region
FAA report
20140711014649A
Case key
89656

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot did not maintain control of the helicopter during the takeoff resulting in low rotor rpm and impact of the fuel trailer during the running landing.

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotAll aircraft: 9,295 casesProbable cause
Performance/control parameters: prop/rotor parametersAircraft › Aircraft oper/perf/capability · Not attained/maintainedAll aircraft: 182 casesProbable cause
Object/animal/substance: ground vehicleEnvironmental issues › Physical environment · Contributed to outcomeAll aircraft: 132 cases

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

One witness reported seeing the helicopter transition to the west with "low power indications" and "multiple yaws." The helicopter settled to the ground and then struck a fuel trailer near the taxiway, resulting in substantial damage to the tail boom. According to the pilot, he transitioned the helicopter to a hover and taxied adjacent to the taxiway. When he attempted a forward takeoff from the hover, the "low rotor rpm warning sounded, the helicopter lost lift," and he performed a "running landing." He stated that there were no mechanical malfunctions or failures with the helicopter during the flight. An examination of the helicopter confirmed that there was nothing mechanically wrong with the helicopter.

Factual narrative

One witness reported seeing the helicopter transition to the west with "low power indications" and "multiple yaws." The helicopter settled to the ground and then struck a fuel trailer near the taxiway. According to the pilot, he transitioned the helicopter to a hover and taxied adjacent to the taxiway. When he attempted a forward takeoff from the hover, the "low rotor rpm warning sounded, the helicopter lost lift," and he performed a "running landing." He stated that there were no mechanical malfunctions or failures with the helicopter during the flight. The Federal Aviation Administration inspector confirmed that there was nothing mechanically wrong with the helicopter. One tail rotor blade and the stabilizer separated from the tail boom.

Aircraft

Registration
N69MP
Reported as
Robinson Helicopter R44 II (II)
Category
Helicopter
Serial number
11941
Built
2007
Airframe hours
770
Engine
Lycoming IO-540-AE1A5, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · November 13, 2013
Departed
KAPA · Englewood, CO
Destination
KOGA · Ogallala, NE
Airport
KAPA · Centennial
Equipment
Handheld GPS

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
60
Injuries
None
Certificate
Private
Medical
Class 3, With waivers/limitations
Last flight review
May 22, 2014
Seat
Right
Restraint
4-point
Flight hours
421.7 total · 300.6 in this make and model · 321.3 as pilot in command · 47.7 in the last 90 days · 4.3 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
68 °F, dew point 54 °F
Altimeter
30.15 inHg
Observed at
KAPA

Docket · 3

The files NTSB released with the investigation on September 3, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 632 KB 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.