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NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

July 22, 1995 · Hughes 269B · N9483F

Honesdale, PA

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
July 22, 1995
Injury Outcomes
No injuries (1 uninjured)
Location
Honesdale, PA
Aircraft
Hughes 269B
Tail Number
N9483F
Injuries
None
Aircraft Damage
Destroyed
NTSB Number
NYC95LA170

The pilot stated that after takeoff from the heliport, 'He felt a low frequency vibration.' He elected to return to the heliport to determine the cause of the vibration. After the pilot landed, he had the collective positioned to full down when the helicopter began a violent forward and aft gyration. The main rotors struck the ground. Examination of the landing skids revealed that the left (4H) shock strut assembly had separated from the landing skid due to severe exfoiliation corrosion at both attaching lugs. All three remaining struts were attached.

NTSB Probable Cause

Corrosion and subsequent failure of the attaching lugs for the left (4H) shock strut assembly, which resulted in collapse of the landing gear/skid.

Full Narrative

On July 22, 1995, about 1730 eastern daylight time, a Hughes 269B, helicopter, N9483F, was destroyed after the landing gear skid collapsed while standing with the engine operating, at a private heliport (P48), near Honesdale, Pennsylvania. The private pilot was not injured. Visual meteorological conditions prevailed, and no flight plan had been filed. The local, personal flight was being conducted under 14 CFR Part 91. The pilot stated that after take off from the heliport he, "felt a low frequency vibration." He thought this was associated with the main rotor, so he elected to return to the heliport to determine the cause of the vibration. He landed on the helipad and tried to make radio contact with his instructor to advise him of the problem. According to the pilot's statement on the NTSB Form 6120.1/2: ...the machine was completely on the ground with the pitch stick in the full down position. Rotor and engine RPM's were at operating range. I reached my cyclic hand to adjust the radio, and no sooner returned it [to the cyclic] to pull [the] trigger and talk...the helicopter began a violent forward and aft gyration and pounding...it proceeded to self destruct around me.... The examination of the landing skids, revealed that the left (4H) shock strut assembly had separated from the landing skid. According to the FAA Inspector's statement: ...severe exfoliation corrosion was noticed at both attaching lugs. The lugs had failed due to corrosion. All three (3) remaining shock struts were attached. At the time of the accident, the pilot had 224 total flight hours, 80 hours as a student pilot, rotorcraft, and 10 flight hours in this make and model helicopter. The reported winds, at the time of the accident, were calm.

Flight

Event TypeAccident
Event Time17:30 EDT
Nearest AirportEvergreen Heliport (0nm)
Runway36
Runway Length30 ft
Runway Width30 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftHughes 269B
Tail NumberN9483F
Aircraft CategoryHeli
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · HIO-360-A1A · Reciprocating · 180
Seats2

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 33 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind360°
Visibility5 sm
CeilingOvercast 2000 ft
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data