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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 16, 1984 · Hiller UH-12E · N1043L

Redmond, OR

Overview

Report Status

Preliminary report

Event Type

Accident

Date

July 16, 1984

Injury Outcomes

1 injury (1 minor injury)

Location

Redmond, OR

Aircraft

Hiller UH-12E

Tail Number

N1043L

Operator

Project Helicopters

Injuries

Minor

Aircraft Damage

Substantial

NTSB Number

SEA84LA174

THE ACFT COLLIDED WITH THE GROUND AFTER A IN-FLT MAIN ROTOR BLADE SEPARATION DURING AN AERIAL APPLICATION FLT. INSPECTION OF THE FRACTURE SURFACE OF THE FAILED BLADE REVEALED CHARACTERISTICS CONSISTANT WITH THE HIGH STRESS, LOW CYCLE FATIGUE. LAB FINDINGS WILL BE COMPARED WITH SIMILIAR FAILURES WHICH HAVE OCCURRED SUBSEQUENT TO THE EXISTING AIRWORTHINESS DIRECTIVE (AI 80-14-12) REQUIRING SPECIAL INSPECTION OF THE SAME FAILURE AREA.

Full Narrative

THE ACFT COLLIDED WITH THE GROUND AFTER A IN-FLT MAIN ROTOR BLADE SEPARATION DURING AN AERIAL APPLICATION FLT. INSPECTION OF THE FRACTURE SURFACE OF THE FAILED BLADE REVEALED CHARACTERISTICS CONSISTANT WITH THE HIGH STRESS, LOW CYCLE FATIGUE. LAB FINDINGS WILL BE COMPARED WITH SIMILIAR FAILURES WHICH HAVE OCCURRED SUBSEQUENT TO THE EXISTING AIRWORTHINESS DIRECTIVE (AI 80-14-12) REQUIRING SPECIAL INSPECTION OF THE SAME FAILURE AREA.

Flight

Event TypeAccident

Event Time07:20 PDT

Nearest Airport0nm N

Runway0

Flight Plan FiledNone

Aircraft FireNo

Aircraft ExplosionNo

Aircraft

AircraftHiller UH-12E

Tail NumberN1043L

Aircraft CategoryHeli

DamageSubstantial

OperatorProject Helicopters

Operating RulePart 137

Engines1

Engine TypeReciprocating

Engine DetailsLycoming · VO-540-C2A · Reciprocating · 340

Seats4

People & Injuries

Injury Summary1 injury (1 minor injury)

Fatal0

Serious0

Minor1

Uninjured0

Total1

Crew 1Age 36 · Second Class

Conditions

ConditionsVMC

LightDaylight

WindCalm

Visibility45 sm

CeilingNone

Temperature / Dew Point66 F / 43 C

Altimeter30.00 inHg

Observation Time14:00

Weather SourceWFAC

500 – Data service is offline

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July 16, 1984 · Hiller UH-12E · N1043L

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