MKC84LA206

NTSB accident investigation · Brantly Helicopter B-2 · Bennington, KS · July 8, 1984

Accident · Minor injuriesLimited investigationFinal report

Date: July 8, 1984, 12:10 local (17:10 UTC)
Place: Bennington, KS
Injuries: 2 minor
Damage: Substantial damage
Phase of flight: Maneuvering
Aircraft: N4999CBrantly Helicopter B-2
Weather: Visual (VMC) · Day
Status: Completed
Report: Approved by Office Director
FAA report: 19840708030819A
Case key: 33736

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

On this page

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 flightHover

Proper altitude - not maintainedPilot in commandCause

Lack of total experiencePilot in commandCause

Directional control - not maintainedPilot in commandCause

In flight collision with terrain/waterHover

Descent - not correctedPilot in commandCause

Roll overOther

Analysis

The student plt stated that after lifting to a hover on her first solo flt, she made two 180 degree hovering turns. She said that the helicopter entered a violent lateral vibration and descended to the ground. Examination of the wreckage did not disclose any evidence of pre-impact malfuction or failure that would have contributed to the accident.

Aircraft

Registration: N4999C
Reported as: Brantly Helicopter B-2
Category: Helicopter
Airframe hours: 564
Engine: Lycoming VO-360-A1B, 180 horsepower, reciprocating
Damage: Substantial damage
Flight: Instructional · Part 91
Operator: Larry Alderson
Airworthiness certificate: Standard, Normal
Departed: Bennington, KS
Airport: Berkley

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role: Pilot
Age: 32
Certificate: Student
Medical: Class 3, Valid Medical--w/ waivers/lim
Seat: Left
Flight hours: 16 total · 16 in this make and model · 16 in the last 90 days · 16 in the last 30 days · 2 in the last 24 hours

Weather

Conditions: Visual (VMC) · Day
Wind: 210° at 15 knots
Visibility: 15 statute miles
Lowest ceiling: None
Temperature: 97 °F, dew point 68 °F
Altimeter: 29.00 inHg
Observed at: SLN, 16 nm away

FAA reports on this event · 1

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

Accident 19840708030819AHynes B2 · Bennington, KSStudent practicing hovering reported vibration. Rollover on sidewards ground impact. No malfunction found.Jul 8, 1984 · N4999C · Substantial damage