MKC84FA029

NTSB accident investigation · Aerospatiale AS350D · Sweet Springs, MO · November 21, 1983

Accident · Serious injuriesField investigationFinal report
Date
November 21, 1983, 16:25 local (22:25 UTC)
Place
Sweet Springs, MO
Injuries
3 serious
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N5778XAerospatiale AS350D
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19831121058459A
Case key
33504

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.

Loss of engine power(total) - mech failure/malfApproach - vfr pattern - downwind
Turboshaft engine - failure,totalCause
Engine instrument - inaccurateManufacturerCause
Turboshaft engine,gas generator turbine - burnedCause
Maintenance,inspection - inadequateCompany maintenance personnelCause
Engine instruments,egt/tot gage - false indicationCause
Forced landingLanding - flare/touchdown

Analysis

The helicopter landed hard during a forced landing after a power loss during a ferry flt. The plt stated that at about 200 ft turning on a base leg for landing he heard a loud bang and the engine failed. A witness said he heard the engine die and saw the helicopter descend. The plt said he pulled off rotor RPM to extend his glide and impacted the ground on a sidewalk while in a right turn. The 3 occupants were seriously injured. An examination of the engine by the operator disclosed an intermittent electrical open of the T-4 wiring harness splice; aerospatiale p/n 320570 extension lead and p/n 327637 reduction. Movement of the wire resulted in a reduced indication of the T-4 temperature gauge of approximately 75 degrees at ground operating temperatures.

Aircraft

Registration
N5778X
Reported as
Aerospatiale AS350D
Category
Helicopter
Serial number
1409
Airframe hours
5,601
Engine
Lycoming LTV 101-600A2, 521 horsepower, turbo shaft
Damage
Substantial damage
Flight
Positioning · Part 91
Operator
Rocky Mountain Helicopters Inc, doing business as [Ems]
Registered owner
James B. Burr
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · November 18, 1983 · 4 hours before
Departed
Columbia, MO

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
37
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
6,499 total · 398 in this make and model · 6,299 as pilot in command · 80 in the last 90 days · 18 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 4 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 46 °F
Altimeter
29.00 inHg
Observed at
COLI, 57 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.