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NTSB Report

March 7, 2000 · Bell 47G-4A · N1354X

Wasco, CA

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
March 7, 2000
Injury Outcomes
No injuries (1 uninjured)
Location
Wasco, CA
Aircraft
Bell 47G-4A
Tail Number
N1354X
Operator
Inland Crop Dusters
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX00LA116

The pilot landed the single-engine helicopter in a muddy field after experiencing a loss of engine power while climbing through 200 feet. The pilot reported hearing and feeling a bang, then a jolt to the left, followed by a loss of engine power. The pilot landed the helicopter in a field with furrows, which forced the tail up resulting in a tail strike. After the accident, the pilot reported to the operator that he may have experienced carburetor icing. An overhaul of the engine did not reveal any anomalies that would have prevented the engine's operation. According to the FAA's Carburetor Icing Probability Chart with the reported temperature and dew point, the conditions existed for "Serious Icing at Cruise Power."

NTSB Probable Cause

The pilot's failure to use carburetor heat, which resulted in a loss of engine power. Factors included the ambient carburetor icing conditions and the lack of suitable terrain for the forced landing.

Full Narrative

On March 7, 2000, at 1020 Pacific standard time a Bell 47G-4A single-engine helicopter, N1354X, was substantially damaged during a forced landing following a loss of engine power after takeoff from a field near Wasco, California. The commercial pilot, who was the sole occupant, was not injured. The aircraft was registered to and operated by Inland Crop Dusters, Inc., of Bakersfield, California, as an agricultural application flight under 14 CFR Part 137. The flight had originated from a service truck shortly before the accident. Visual meteorological conditions prevailed at the time of the accident and a flight plan was not filed. According to a written statement provided by the pilot, he departed for a spray run after filling the hopper. When the helicopter reached 200 feet, the pilot "heard and felt a bang, then a jolt (to the left)," then the engine lost power. The pilot stated that he landed "softly straight ahead in a muddy field." He added that "the furrows in the field forced the nose down and the tail section up upon touchdown, causing a tail strike." The pilot told the operator that he may have experienced carburetor icing. The engine was overhauled after the accident, and no anomalies were noted during the overhaul that would have prevented its operation. At 0956, the weather observation facility at the Meadow Field Airport, Bakersfield, (located 25 miles southeast of the accident site), reported the wind from 130 degrees at 5 knots; 10 statute miles visibility; clear skies; temperature 52 degrees Fahrenheit; dew point 43 degrees Fahrenheit; and an altimeter setting of 30.01 inches of mercury. According to the Federal Aviation Administration's Carburetor Icing Probability Chart, dated June 1982, with a temperature and dew point of 52 and 43 degrees, respectively, the conditions existed for "Serious Icing at Cruise Power."

Flight

Event TypeAccident
Event Time10:20 PST
Nearest Airport0nm
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBell 47G-4A
Tail NumberN1354X
Aircraft CategoryHeli
DamageSubstantial
OperatorInland Crop Dusters
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · VO-540-B1B3 · Reciprocating · 260
Seats2

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 31 · Second Class · None

Conditions

ConditionsVMC
LightDaylight
Wind130° @ 5 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point52 / 43 C
Altimeter30.01 inHg
Observation Time17:56
Weather SourceWFAC

Appendix: Source Data