FTW96LA149

NTSB accident investigation · Enstrom F-28A · Killeen, TX · March 16, 1996

Accident · Minor injuriesLimited investigationFinal report
Date
March 16, 1996, 11:05 local (17:05 UTC)
Place
Killeen, TX
Injuries
1 minor, 2 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N9574Enstrom F-28A
Weather
Visual (VMC) · Day
Status
Completed · report October 4, 1996
Report
Approved by Office Director
FAA report
19960316004379A
Case key
19785

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 pilot's improper planning/decision, which resulted in fuel exhaustion and a loss of engine power, due to an inadequate supply of fuel. A factor relating to the accident was: lack of suitable terrain for an emergency landing (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) - nonmechanicalManeuvering
Planning/decision - improperPilot in commandCause
Fluid,fuel - exhaustionCause
Fuel supply - inadequatePilot in commandCause
Forced landingEmergency descent/landing
Autorotation - performedPilot in command
Hard landingEmergency landing
Terrain condition - none suitableFactor
Terrain condition - rough/uneven

Analysis

The pilot reported that during his preflight of the helicopter, he knew that the fuel tanks were not full, but they 'seemed adequate.' He estimated that the two 15 gallon tanks were about '3/4 of a tank capacity.' The helicopter was last flown the night before by another pilot. That pilot estimated that the fuel tanks were only '1/4 full' at the end of that flight. The Pilot/Owners Handbook revealed a fuel consumption of about 19.1 gallons per hour at 100% power and 12.2 gallons per hour at 75% power. The accident pilot reported that 'a normal start, warm-up and rotor engagement' were made before a 'hovering demonstration and short flight' were accomplished. He then boarded two passengers, lifted off, and performed another hovering demonstration. The pilot then flew west for about 3 miles, and the engine began to 'run rough.' Subsequently, the engine 'quit completely,' and the pilot autorotated to rough and uneven ground, where the helicopter touched down hard. Postcrash examination revealed no evidence of fuel in the fuel tanks.

Factual narrative

On March 16, 1996, at 1105 central standard time, an Enstrom F-28A, N9574, registered to and operated by a private owner under Title 14 CFR Part 91, was substantially damaged during a forced landing near Killeen, Texas. The commercial helicopter pilot and one passenger were not injured; however, one passenger sustained minor injuries. Visual meteorological conditions prevailed for the local flight that originated at Killeen Municipal Airport near Killeen, Texas, approximately 26 minutes before the accident. No flight plan was filed.

The pilot reported in the Pilot/Operator Aircraft Accident Report that during his preflight of the helicopter he knew that the fuel tanks were not full, but they "seemed adequate." He estimated that the two 15 gallon tanks were about "3/4 of a tank capacity." The pilot reports that he performed the "walkaround" of the helicopter while "talking about several items to individuals present." The pilot further reports that "a normal start, warm-up and rotor engagement" were made before a "hovering demonstration and short flight to the west along highway 190 and return to Killeen airport."

The helicopter was last flown the night before, by another pilot. He reported to a FAA inspector that he thought the fuel tanks were only "1/4 full" at the termination of that flight.

The Pilot's Owners Handbook for the Enstrom F-28A revealed a fuel consumption of approximately 19.1 gallons per hour at 100%. Fuel consumption at 75% power, is approximately 12.3 gallons per hour.

The pilot states that after he returned to Killeen Airport, two passengers were boarded and he began a second flight identical to the first. He performed a hovering demonstration, and, then flew west along highway 190. Approximately 3 miles later, the engine began to "run rough." Subsequently the engine "quit completely" and the pilot autorotated to the rough and uneven ground. The ensuing hard landing damaged the main rotor blade, tailboom, tail rotor gearbox, tail rotor, tail skid, and left rear diagonal skidtube.

Post-crash examination of the aircraft by a FAA inspector revealed no evidence of fuel in the fuel tanks.

Aircraft

Registration
N9574
Reported as
Enstrom F-28A
Category
Helicopter
Serial number
132
Airframe hours
1,338
Engine
Lycoming HIO-360-C1A, 205 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Terry L. Higgins
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · January 4, 1996 · 116 hours before
Departed
ILE

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
50
Certificates
Commercial, Private
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
4,000 total · 23 in this make and model · 2,300 as pilot in command · 9 in the last 90 days · 2 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
240° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 52 °F
Altimeter
29.00 inHg
Observed at
ILE, 3 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.