ATL90FA075

NTSB accident investigation · Sikorsky HSS-1N · Cross, SC · March 9, 1990

Accident · FatalField investigationFinal report
Date
March 9, 1990, 09:00 local (14:00 UTC)
Place
Cross, SC
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N4875MSikorsky HSS-1N
Weather
Visual (VMC) · Day
Status
Completed · report December 14, 1992
Report
Approved by Office Director
FAA report
19900309014959A
Case key
8117

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

Improper planning/decision by the pilot, which resulted in fuel exhaustion due to an inadequate supply of fuel, and his failure to fly the helicopter in such a manner that would have assured sufficient rotor RPM for an autorotation.

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) - nonmechanicalCruise
Planning/decision - improperPilot in commandCause
Fluid,fuel - exhaustionCause
Fuel supply - inadequatePilot in commandCause
Forced landingDescent - emergency
Autorotation - initiatedPilot in command
Loss of control - in flightDescent - emergency
Rotor rpm - not maintainedPilot in commandCause
In flight collision with objectDescent - uncontrolled
Object - tree(s)

Analysis

The pilot had completed about one hour of logging and was en route to the refueling point. The engine quit when the helicopter was about 200 ft over a wooded area. Witnesses observed the helicopter in a nose high attitude, followed by slowing of the main rotor blades. One witness recalled the helicopter rotated about 180 deg before colliding with trees. The pilot was removed from the helicopter before it burst into flames & was destroyed. Before the pilot died, he reported the fuel gage was indicating between 100 and 200 lbs before it crashed. An exam of the helicopter failed to reveal any preimpact mechanical problems. The operating policy was to refuel with 800 pounds of fuel plus 200 pounds as a safety net. At 200 ft AGL, a forward speed of over 48 mph would have been needed to be out of the shaded area of the height-velocity chart for this helicopter.

Aircraft

Registration
N4875M
Reported as
Sikorsky HSS-1N
Category
Helicopter
Serial number
147987
Engine
Wright R-1820, 525 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Other work use · Part 133
Registered owner
Liberty Helicopters

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
41
Certificate
Commercial
Medical
Class 2, Valid Medical--no waivers/lim.
Toxicology
Performed
Flight hours
9,000 total · 34 in the last 90 days · 34 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
350° at 5 knots
Visibility
7 statute miles
Lowest ceiling
5,500 ft overcast
Temperature
55 °F, dew point -0 °F

FAA reports on this event · 1

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