ATL86FA218

NTSB accident investigation · Hughes 269C · Laurens, SC · August 11, 1986

Accident · No injuriesField investigationFinal report
Date
August 11, 1986, 12:15 local (16:15 UTC)
Place
Laurens, SC
Injuries
1 uninjured
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N7442FHughes 269C
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19860811039419A
Case key
6956

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

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.

Airframe/component/system failure/malfunctionCruise - normal
Rotor drive system,main gearbox/transmission - fatigueCause
Maintenance,inspection - inadequateCompany maintenance personnelCause
Rotor drive system,main gearbox/transmission - separationCause
Maintenance,compliance with ad - not followedCompany maintenance personnelCause
Rotor drive system,main gearbox/transmission - life expiredCause
Maintenance,service bulletin/letter - disregardedCompany maintenance personnelCause
Maintenance,recordkeeping - inaccurateOther maintenance personnelCause
Loss of engine powerCruise - normal
Engine assembly - overspeed
Engine assembly,valve,intake - separation
Engine assembly,valve,intake - overspeed
Forced landingDescent - emergency
Roll overLanding - flare/touchdown

Analysis

The plt was flying an underground cable patrol at 500-600 ft AGL when the accident occurred. The plt reported pwr was set at 20' hg, 3,000 RPM when a 'very loud pop' was heard. The plt likened the sound to being hit by ground fire. The acft yawed and the eng oversped. An autorotation was performed into an abandoned mining pit. The acft nosed up and rolled over on its right side. The plt stated that the eng would respond to throttle but the main rotor would not follow pwr changes. The main rotor transmission to have a ring gear carrier failure. AD 81-1704 and related service notice concerning this part had not been complied with.

Aircraft

Registration
N7442F
Reported as
Hughes 269C
Category
Helicopter
Serial number
460498
Airframe hours
2,157
Engine
Lycoming HIO-360-01A, 190 horsepower, reciprocating
Damage
Destroyed
Flight
Aerial observation · Part 91
Registered owner
Mid-State/Executing Helicopter
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · July 19, 1986 · 94 hours before
Departed
GRD · Greenwood, SC
Destination
CLT · Charlotte, NC

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
55
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
3,000 total · 160 in this make and model · 160 in the last 90 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
70° at 25 knots, gusting 30
Visibility
20 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 57 °F
Altimeter
29.00 inHg

FAA reports on this event · 1

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