ATL99LA036

NTSB accident investigation · Bell 47G-3B-2 · Murfreesboro, TN · December 30, 1998

Accident · No injuriesLimited investigationFinal report
Date
December 30, 1998, 15:00 local (21:00 UTC)
Place
Murfreesboro, TN
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N123NMBell 47G-3B-2
Weather
Visual (VMC) · Day
Status
Completed · report February 22, 2001
Report
Approved by Office Director
FAA report
19981230034399A
Case key
45507

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 inadequate flare and his diverted attention, which resulted in a hard landing.

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.

Hard landingLanding - flare/touchdown
Misc rotorcraft,tail boom - cut/severed
Flare - inadequatePilot in commandCause
Diverted attentionPilot in commandCause

Analysis

The pilot had completed a local photographic flight, and was returning to the airport to refuel. While on short final to land, about five feet above the ground, the pilot's flight chart slipped off his right leg, and he was momentarily distracted while looking down to retrieve the chart. The pilot reported that the helicopter struck the ground in a level attitude on the skids. The passenger described the touchdown as 'abnormally hard'. The pilot said when he went to reposition the helicopter for refueling, he had no tail rotor pedal control. He then proceeded to shut the helicopter down. An examination of the helicopter disclosed that the tail boom assembly had been severed, and there was damage to the trailing edge of one of the main rotor blades. No mechanical problems with the helicopter were reported by the pilot.

Factual narrative

On December 30, 1998, about 1500 central standard time, a Bell 47G-3B-2 helicopter, N123NM, collided with the ground during a landing on runway 36 at the Murfreesboro Municipal Airport (MBT), Murfreesboro, Tennessee. The helicopter was operated by Photo Data Services LLC, under the provisions of Title 14 CFR Part 91, and visual flight rules. Visual meteorological conditions prevailed. A flight plan was not filed for the local aerial survey flight. There were no injuries to the commercial helicopter pilot nor the photographer. The helicopter was substantially damaged. The flight had originated from the Murfreesboro Airport about 1400, on the same day.

The pilot had completed a local photographic flight, and was returning to the airport to refuel. While on short final to land, about five feet above the ground, the pilot's flight chart slipped off his right leg, and he was momentarily distracted while looking down to retrieve the chart. The pilot reported that the helicopter struck the ground in a level attitude on the skids. The passenger described the touchdown as "abnormally hard". The pilot said when he went to reposition the helicopter for refueling, he had no tail rotor pedal control. He then proceeded to shut the helicopter down.

An examination of the helicopter disclosed that the tail boom assembly had been severed, and there was damage to the trailing edge of one of the main rotor blades. No mechanical problems with the helicopter were reported by the pilot.

Aircraft

Registration
N123NM
Reported as
Bell 47G-3B-2
Category
Helicopter
Serial number
6702
Airframe hours
8,514
Engine
Allison CAE C20B, 420 horsepower, turbo shaft
Damage
Substantial damage
Flight
Other work use · Part 91
Registered owner
Photo Data Services LLC
Airworthiness certificate
Special, Restricted (Special)
Last inspection
AAIP · November 6, 1998 · 176 hours before
Departed
MBT
Airport
MBT · Murfreesboro Municipal, runway 36, concrete

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
39
Certificate
Commercial
Instrument ratings
Helicopter
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
1,813 total · 149 in this make and model · 1,615 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 55 °F
Altimeter
30.00 inHg
Observed at
MBT

FAA reports on this event · 1

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