FTW97LA361

NTSB accident investigation · Bell 206-L4 · Hurst, TX · September 23, 1997

Accident · No injuriesLimited investigationFinal report
Date
September 23, 1997, 10:10 local (15:10 UTC)
Place
Hurst, TX
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9264GBell 206-L4
Weather
Visual (VMC) · Day
Status
Completed · report November 6, 1998
Report
Approved by Office Director
FAA report
19970923028229A
Case key
20356

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 improper touchdown by the commercial pilot receiving instruction. A factor was the flight instructor's inadequate supervision.

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
Emergency procedure - simulatedDual student
Touchdown - improperDual studentCause
Supervision - inadequatePilot in command(cfi)Factor
Misc rotorcraft,tail boom - buckled

Analysis

While the commercial pilot was terminating a practice straight-in autorotation, he initiated a flare and applied initial collective pitch to slow the helicopter's rate-of-closure. The aircraft touched down 'firm' with a 'slight nose high attitude,' and then a strong short shudder was felt as the aircraft slid to a stop within one helicopter length. The main rotor RPM was between 65 to 70 percent. The flight instructor examined the tailboom for damage before continuing with the the training flight. After completion of the planned maneuvers, the helicopter was flown to the Bell Helicopter Plant 8 Heliport and shut down. During a postflight inspection, wrinkles were found on the sides of the tail boom. The winds were reported from 180 degrees at 10 knots, and the density altitude was calculated at 2,401 feet.

Factual narrative

On September 23, 1997, at 1010 central daylight time, a Bell 206-L4 helicopter, N9264G, registered to Textron Financial Corporation and operated by Bell Helicopter Textron, was substantially damaged during landing to the south at the BHT2 Training Strip, Hurst, Texas. The airline transport rated flight instructor and the commercial pilot receiving instruction, were not injured. Visual meteorological conditions prevailed, and a company flight plan was filed for the Title 14 CFR Part 91 instructional flight. The flight originated from the Bell Helicopter Plant 8 Heliport, about 10 minutes before the accident.

According to the flight instructor, the student was performing straight-in autorotations to the south. While the student was terminating a straight-in autorotation, he initiated a flare and applied initial collective pitch to slow the helicopter's rate-of-closure. The aircraft touched down "firm" with a "slight nose high attitude," and then a strong short shudder was felt as the aircraft slid to a stop within one helicopter length. The main rotor RPM was between 65 to 70 percent.

The flight instructor added that after the landing, he examined the tailboom for damage. No damage was found and the training flight was continued. The flight instructor stated that "we were at the end of the period and left the practice area for the hill top [Bell Helicopter Plant 8 Heliport], did 4 slope operations and then parked the helicopter." During the post flight inspection of the helicopter, wrinkles were found on the sides of the tailboom.

The winds were reported from 180 degrees at 10 knots, and the density altitude was calculated at 2,401 feet.

Aircraft

Registration
N9264G
Reported as
Bell 206-L4
Category
Helicopter
Serial number
52081
Airframe hours
1,187
Engine
Allison 250-C30, 650 horsepower, turbo shaft
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Bell Helicopter Textron, Inc.
Registered owner
Textron Financial Corporation
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 7, 1997 · 53 hours before
Departed
2F2
Flight plan
Company VFR
Airport
2F2 · Bht2 Training Strip, runway 18, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
61
Certificates
Flight instructor, Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
10,000 total · 3,500 in this make and model · 9,000 as pilot in command · 100 in the last 90 days · 32 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
84 °F

FAA reports on this event · 1

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