DEN93FA033

NTSB accident investigation · Hiller UH-12E · Applegate, OR · March 16, 1993

Accident · FatalField investigationFinal report
Date
March 16, 1993, 15:10 local (23:10 UTC)
Place
Applegate, OR
Injuries
3 fatal
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N5344VHiller UH-12E
Weather
Instrument (IMC) · Day
Status
Completed · report November 3, 1993
Report
Approved by Office Director
FAA report
19930316005529A
Case key
18247

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 initiating flight into known adverse weather. Factors were: low ceiling, fog, and turbulence.

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.

In flight encounter with weatherTakeoff - initial climb
Weather condition - low ceilingFactor
Weather condition - fogFactor
Weather condition - turbulenceFactor
Loss of control - in flightManeuvering
Flight into known adverse weather - initiatedPilot in commandCause
In flight collision with objectDescent - uncontrolled
Object - tree(s)

Analysis

The helicopter landed on a mountainside helipad where two passengers were waiting. The pilot of a Sikorsky s 61 helicopter flying nearby cautioned him about clouds moving up the valley. He also noted it was quite windy and turbulent. The pilot replied he was aware of the approaching clouds and that it was bad. Shortly thereafter, the Sikorsky pilot heard the hiller pilot say, I lost it. The main rotor blades and one paddle were found in close proximity to the helicopter; the other paddle was located 300 feet away. Examination of the main rotor head disclosed damage between the hub static stops and the main rotor mast. Metallurgical examination of the fractured surfaces indicated all the breaks were the result of overload forces.

Aircraft

Registration
N5344V
Reported as
Hiller UH-12E
Category
Helicopter
Serial number
2018
Airframe hours
10,750
Engine
Allison 250-C20B, 400 horsepower, turbo shaft
Damage
Destroyed
Flight
Business · Part 91
Operator
Croman Corporation
Registered owner
Croman Corporation
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · March 8, 1993 · 25 hours before

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
47
Certificates
Private, Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
4,304 total · 4,173 as pilot in command · 114 in the last 90 days · 60 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Day

FAA reports on this event · 1

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

Other investigations on N5344V · 1

Matched to the same aircraft by N-number and date.