ANC98LA037

NTSB accident investigation · Enstrom F-28F · Haines, AK · April 12, 1998

Accident · Minor injuriesLimited investigationFinal report
Date
April 12, 1998, 14:30 local (22:30 UTC)
Place
Haines, AK
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N199LBEnstrom F-28F
Weather
Visual (VMC) · Day
Status
Completed · report December 8, 1998
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19980412006729A
Case key
3129

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 flaring too low during an improper practice autorotation.

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
Autorotation - improperPilot in commandCause
Flare - improperPilot in commandCause

Analysis

The pilot stated that he held his flare too long during a practice autorotation and allowed the tail to contact the ground.

Factual narrative

On April 12, 1998, at 1430 Alaska daylight time, an Enstrom F-28F helicopter, N199LB, sustained substantial damage during a hard landing at the Haines Airport, Haines, Alaska. The commercial helicopter pilot sustained minor injuries. The flight was conducted under 14 CFR Part 91, and departed Haines at 1425 as a local training flight. Visual meteorological conditions prevailed at the time of the accident, and a flight plan was filed with the pilot's company.

The pilot last received flight instruction in the make and model helicopter five months prior to the accident. He had conducted a solo practice flight two days prior to the accident.

During an interview with the NTSB investigator on April 13, 1998, the pilot stated he was practicing autorotations in preparation for an upcoming flight instructor flight test. He indicated the 15 to 20 knot winds were aligned with the runway. During the autorotative flare, the helicopter tail skid contacted the runway, and the helicopter landed hard. The tail rotor gear box subsequently separated, and two main rotor blades contacted the tail boom. The pilot indicated to the NTSB investigator during an interview, and in his NTSB Pilot/Operator Report, that he held his flare too long, and allowed the tail to contact the ground.

Aircraft

Registration
N199LB
Reported as
Enstrom F-28F
Category
Helicopter
Serial number
790
Airframe hours
189
Engine
Lycoming HIO-360, 225 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Layton Alden Bennett
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 5, 1998 · 5 hours before
Departed
HNS
Destination
HNS
Flight plan
Company VFR
Airport
HNS · Haines, runway 8, 4,000 × 100 ft, asphalt

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
79
Certificates
Commercial, Airline transport
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
30,000 total · 220 in this make and model · 30,000 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
80° at 15 knots, gusting 20
Visibility
10 statute miles
Lowest ceiling
None
Temperature
39 °F

FAA reports on this event · 1

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