IAD97LA051

NTSB accident investigation · Hughes 369HS · Marion, OH · February 24, 1997

Accident · No injuriesLimited investigationFinal report
Date
February 24, 1997, 12:05 local (17:05 UTC)
Place
Marion, OH
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N340EMHughes 369HS
Weather
Visual (VMC) · Day
Status
Completed · report June 21, 2000
Report
Approved by Office Director
FAA report
19970224001839A
Case key
28177

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

Uncovering of the fuel tanks outlet, which resulted in fuel starvation and subsequent loss of engine power. A related factor was the unsuitable terrain.

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
Fluid,fuel - starvationCause
Trim setting - improperPilot in command
Forced landingEmergency descent/landing
Hard landingEmergency landing
Terrain condition - none suitableFactor
Autorotation - improperPilot in command

Analysis

The pilot had the fuel tank topped off 9 days before the accident and flew the helicopter for 15 minutes. On the day of the accident he added an additional 5 gallons. About 1 1/2 hours after takeoff the engine lost power. The pilot autorotated to a field and landed hard. Examination of the engine did not reveal any engine abnormalities or malfunctions. The helicopter's total fuel capacity was 64 gallons, of which 63.4 gallons was useable. When the helicopter was leveled and electrical power applied, the low fuel light was illuminated, and 5 3/4 gallons were pumped out by the fuel boost pump. According to the helicopter's flight manual, at low fuel level, sideslip may cause the fuel tank outlet to become uncovered causing fuel starvation. A review of the pilot's log book revealed that he was not helicopter rated, but had a helicopter solo endorsement that expired about 60 days prior to the accident.

Factual narrative

On February 24, 1997, at 1205 eastern standard time, a Hughes 369HS, N340EM, was substantially damaged during a forced landing near Marion, Ohio. The certificated private pilot was not injured. Visual meteorological conditions prevailed and a flight plan was not filed. The business flight was conducted under 14 CFR Part 91. The flight originated from Port Huron, Michigan, destined for Urbana, Ohio.

According to the pilot, about 1 1/2 hours into the flight, and about 10 miles northeast of his destination, the engine lost power. He entered autorotation, but the helicopter touched down hard, the left skid separated, the right front skid separated, and the helicopter rolled over on the left side.

The pilot said he topped off the fuel tank 9 days before the accident, and he had flown 15 minutes that day. On the day of the accident, he purchased an additional 5 gallons. The total fuel capacity of the fuel tank was 64 gallons, of which 63.4 gallons was useable.

According to a Federal Aviation Administration Inspector, examination of the fuel system did not reveal any air leaks. The helicopter was leveled and electrical power was applied. When the power was applied, the low fuel light was illuminated, and using the helicopter fuel boost pump, 5 3/4 gallons were collected in a container before the fuel flow stopped.

According to the helicopter flight manual, at low fuel level, sideslip may cause the fuel tanks outlet to become uncovered causing fuel starvation. Examination of the helicopter and engine did not reveal any abnormalities that would have precluded operation.

A review of the pilot's log book revealed that he was not helicopter rated, but had a helicopter solo endorsement that expired about 60 days prior to the accident.

Aircraft

Registration
N340EM
Reported as
Hughes 369HS
Category
Helicopter
Serial number
1290226S
Engine
Allison 250-C10D, 278 horsepower, turbo shaft
Damage
Substantial damage
Flight
Business · Part 91
Registered owner
Manfred W Engler
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 11, 1996 · 71 hours before
Departed
PHN · Port Huron, MI
Destination
I78 · Marysville, OH

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
56
Certificates
Private, Foreign
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
1,495 total · 105 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 8 knots, gusting 10
Visibility
30 statute miles
Lowest ceiling
None
Temperature
34 °F
Altimeter
30.00 inHg

FAA reports on this event · 1

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