ATL87FA147

NTSB accident investigation · Hiller UH-12D (H23) · Spartanburg, SC · May 24, 1987

Accident · FatalField investigationFinal report
Date
May 24, 1987, 12:30 local (16:30 UTC)
Place
Spartanburg, SC
Injuries
1 fatal, 1 serious
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N6408Hiller UH-12D (H23)
Weather
Visual (VMC) · Day
Status
Completed · report May 2, 1988
Report
Approved by Office Director
FAA report
19870524015509A
Case key
7297

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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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
Engine assembly,other - undeterminedFactor
In flight collision with objectDescent - emergency
Object - tree(s)
Aircraft handling - poorPilot in commandCause
Altitude - inadequatePilot in commandCause
Autorotation - not performedPilot in commandCause
Emergency procedure - poorPilot in commandCause
Terrain condition - ground

Analysis

During a local pleasure flight above the treetops, the passenger reported that they heard a loud 'pop' over the sound of the engine. The plt told her that they were going down and she noticed the main rotor blades began to turn slower than usual before the helo collided with trees and then the ground. A prolonged post impact ground fire consumed the wreckage. Thorough examination of the flight controls, engine and transmission assembly did not reveal any evidence of mechanical malfunction. The fuel and ignition system was completely destroyed by fire and was unable to be evaluated. Associates of the pilot stated that he usually operated at approx 200 ft AGL.

Aircraft

Registration
N6408
Reported as
Hiller UH-12D (H23) (UH-12D (H2)
Category
Helicopter
Serial number
1366
Airframe hours
6,588
Engine
Lycoming O-435-23C-R, 260 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
William E. Humphries
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 18, 1986 · 47 hours before
Departed
SPA · Spartanburg, SC
Destination
Duncan, SC

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
63
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Toxicology
Performed
Flight hours
1,800 total · 1,194 in this make and model · 1,587 as pilot in command · 26 in the last 90 days · 9 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 9 knots
Visibility
12 statute miles
Lowest ceiling
25,000 ft broken
Temperature
84 °F, dew point 70 °F
Altimeter
30.00 inHg
Observed at
GSP, 10 nm away

FAA reports on this event · 1

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