N129BC

Substantial
None

Hughes OH-6AS/N: 67-1B214

Accident Details

Date
Sunday, November 25, 2001
NTSB Number
MIA02LA029
Location
Hernando, MS
Event ID
20011130X02326
Coordinates
34.820716, -89.980514
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
2
Total Aboard
2

Probable Cause and Findings

The flight instructor's improper supervision of the dual student during a practice autorotation landing by allowing an excessive aft pitch attitude and low main rotor rpm conditions to develop during the landing/flare touchdown, which resulted in the helicopter making a hard landing on the heels of the skids, and the main rotor severing the tail boom.

Aircraft Information

Registration
N129BC
Make
HUGHES
Serial Number
67-1B214
Year Built
1968
Model / ICAO
OH-6A

Registered Owner (Historical)

Name
SPOTTERS INC
Address
9102 PMB LINI HWY
Status
Deregistered
City
PORT VILA
Country
United States

Analysis

On November 25, 2001, about 1600 central standard time, a Hughes OH-6A helicopter, N129BC, registered to, and operated by the Desoto County Sheriff's Office, as Title 14 CFR Part 91 instructional flight, made a hard landing at a private field in Hernando, Mississippi. Visual meteorological conditions prevailed, and no flight plan was filed. The student pilot, and the airline transport-rated flight instructor were not injured, and the helicopter incurred substantial damage. The flight originated from Hernando, Mississippi, the same day, about 1610.

The flight instructor stated that they had been practicing autorotations and during the last autorotation the student was flying the helicopter. The instructor said that the airspeed on final was 70 knots, and that the student flared the helicopter at an altitude of about 65 feet, and applied initial collective pitch control input at about 10 feet, leveling the helicopter. He said that the helicopter was about 2 feet high, and still moving forward, and at that point the student did not let the helicopter settle to the ground, but continued to apply collective pitch control input. The instructor said he stopped the student from applying collective pitch control input, and the helicopter started to descend, but the student applied aft cyclic control input, and the helicopter contacted the ground on the heels of the skids, while main rotor rpms were low. He said the main rotor blades contacted the tail boom, severing the tail just forward of the tail rotor gear box. According to the flight instructor, prior to the accident, there were no failures or malfunctions to the helicopter, or any of its systems.

Data Source

Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# MIA02LA029