FTW95LA235

NTSB accident investigation · Robinson R-22 · Weatherford, TX · June 11, 1995

Accident · No injuriesLimited investigationFinal report
Date
June 11, 1995, 16:45 local (21:45 UTC)
Place
Weatherford, TX
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9074YRobinson R-22
Weather
Visual (VMC) · Day
Status
Completed · report December 19, 1995
Report
Approved by Office Director
FAA report
19950611040429A
Case key
19446

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's failure to maintain control during landing resulting in the tail rotor blades striking the ground and separating, and the subsequent loss of directional (anti-torque) control. A factor was the uphill terrain.

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.

Loss of control - in flightLanding - flare/touchdown
Aircraft control - not maintainedPilot in commandCause
Terrain condition - uphillFactor
Rotor system,tail rotor blade - blade strikeCause
Rotor system,tail rotor blade - separationCause
Directional control - not possiblePilot in commandCause

Analysis

The pilot reported that he was landing on a 5 to 7 degree uphill river bank when the helicopter 'lost anti-torque control and spun.' During the landing, witnesses observed the helicopter 'dipping' forward and then 'rock back and forth.' Ground scars, corresponding to leading edge damage on both tail rotor blades, were found at the site. Additionally, both tail rotor blades were found separated from their yokes and the tail boom was structurally damaged.

Factual narrative

On June 11, 1995, at 1645 central daylight time (CDT), a Robinson R-22 helicopter, N9074Y, was substantially damaged while landing on a river bank near Weatherford, Texas. The pilot rated student and passenger received minor injuries. The helicopter, owned by the pilot, was being operated under 14 CFR Part 91 when the accident occurred. The personal flight originated at Downtown Airpark, Oklahoma City, Oklahoma, at 1430 CDT and was en route to Grand Prairie Municipal Airport, Dallas, Texas. No flight plan was filed and visual meteorological conditions prevailed.

The pilot reported that as he was landing on a 5 to 7 degree uphill slope, the helicopter "lost anti-torque control and spun." According to witnesses, the helicopter was landing down wind on a river bank when they observed the nose "dipping" forward, and then "rock back and forth." A Federal Aviation Administration inspector reported that he observed ground scars corresponding to leading edge damage found on both tail rotor blades. Additionally, both tail rotor blades were separated from their yolks, and the tail boom was structurally damaged.

Aircraft

Registration
N9074Y
Reported as
Robinson R-22
Category
Helicopter
Serial number
241
Airframe hours
3,942
Engine
Lycoming O-360-B2C, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Brian Vater
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 30, 1995 · 45 hours before
Departed
2DT · Oklahoma City, OK
Destination
F67 · Grand Prairie, TX

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
38
Certificates
Private, Student
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
400 total · 111 in this make and model · 315 as pilot in command · 1 in the last 90 days · 23 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
15 statute miles
Lowest ceiling
None
Temperature
81 °F
Altimeter
29.00 inHg

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.