CEN10CA138

NTSB accident investigation · Enstrom 280FX · Goshen, IN · March 4, 2010

Accident · Serious injuriesData collectionFinal report
Date
March 4, 2010, 10:30 local (15:30 UTC)
Place
Goshen, IN
Injuries
1 serious, 1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N327TBEnstrom 280FX
Defining event
Maneuvering: Fuel exhaustion
Weather
Visual (VMC) · Day
Status
Completed · report July 1, 2010
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20100304029009A
Case key
75445

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 inadequate preflight inspection by both pilots, resulting in a loss of engine power due to fuel exhaustion. Contributing to the accident was the disconnected fuel tank sending unit.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Fluids: fuelAircraft › Fluids/misc hardware · Inadequate inspectionEnstrom 280FX: 3 casesAll aircraft: 1,695 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelEnstrom 280FX: 3 casesAll aircraft: 1,695 cases
Inspection: preflight inspectionPersonnel issues › Task performance · Flight crewEnstrom 280FX: 2 casesAll aircraft: 551 casesProbable cause
Fuel system: fuel sys wiringAircraft › Aircraft systems · MalfunctionEnstrom 280FX: 1 caseAll aircraft: 5 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The helicopter had undergone an annual inspection and was preflighted and flown by the pilot for a maintenance test flight. The pilot did not check the right fuel tank level during that preflight. On the following day, the pilot and another pilot seated in the right seat departed on another maintenance test flight without visually checking the fuel level in either fuel tank. They instead relied on fuel consumption calculations based upon previous flight time and fuel gauge indications. After about 42 minutes of flight time, the helicopter experienced a total loss of engine power while being piloted by the left-seat pilot. The right-seat pilot then took the controls and performed an autorotation but had to maneuver to change the touchdown point in order to avoid power lines. The helicopter then experienced a hard landing. Postaccident examination of the helicopter revealed that there was about one cup of fuel in the left fuel tank and no fuel in the right fuel tank. Postaccident inspection revealed that an electrical connector from the right fuel tank sending unit was found disconnected, which would have given a false "full" indication of fuel quantity.

Factual narrative

The helicopter had undergone an annual inspection and was preflighted and flown by the pilot for a maintenance test flight. The pilot did not check the right fuel tank level during that preflight. On the following day, the pilot and another pilot seated in the right seat departed on another maintenance test flight without visually checking the fuel level in either fuel tank. They instead relied on fuel consumption calculations based upon previous flight time and fuel gauge indications. After about 42 minutes of flight time, the helicopter experienced a total loss of engine power. The right seat pilot then performed an autorotation but had to maneuver to change the touchdown point in order to avoid power lines. The helicopter then experienced a hard landing. Examination of the wreckage revealed that a connector from the right fuel tank sending unit was disconnected. There was about one cup of fuel in the left fuel tank and no fuel in the right fuel tank. The helicopter sustained substantial damage, including damage to the tail boom. The left seat pilot received minor injuries and the right seat pilot received serious injuries.

Aircraft

Registration
N327TB
Reported as
Enstrom 280FX
Category
Helicopter
Serial number
2118
Airframe hours
244
Engine
Lycoming HIO-360-51A, 225 horsepower, reciprocating
Damage
Substantial damage
Flight
Flight test · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 4, 2010
Departed
GSH · Goshen, IN
Destination
GSH · Goshen, IN
Airport
GSH · Goshen Municipal Airport

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
28
Injuries
Minor
Certificates
Commercial, Flight instructor
Medical
Class 2, With waivers/limitations
Last flight review
March 1, 2010
Seat
Left
Flight hours
346 total · 4 in this make and model · 288 as pilot in command · 43 in the last 90 days · 26 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
350° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
32 °F, dew point 21 °F
Altimeter
30.12 inHg
Observed at
GSH, 1 nm away

Docket · 3

The files NTSB released with the investigation on April 30, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.2 MB in all.

FAA reports on this event · 1

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