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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

February 20, 1995 · Bell 47G-5 · N1309X

Sonoma, CA

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
February 20, 1995
Injury Outcomes
1 injury (1 serious injury)
Location
Sonoma, CA
Aircraft
Bell 47G-5
Tail Number
N1309X
Operator
North Coast Helicopter Service
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
LAX95LA113

THE PILOT REPORTED THAT WHILE PERFORMING A PREFLIGHT INSPECTION HE OBSERVED MOISTURE (DEW) PRESENT ON THE BUBBLE OF HIS HELICOPTER. HE DID NOT HAVE TOWELS, SO HE ATTEMPTED TO WIPE THE BUBBLE CLEAN USING HIS HANDS. THE PILOT FURTHER REPORTED THAT HE OBSERVED BYSTANDERS APPROACHING, SO HE DECIDED TO TAKE OFF AWAY FROM THEIR POSITION, AND HE FLEW INTO TELEPHONE WIRES. THE PILOT ALSO REPORTED THAT THE SUN WAS IN FRONT OF HIM WHICH ALSO RESTRICTED HIS FLIGHT VISIBILITY.

NTSB Probable Cause

the pilot's failure to maintain an adequate visual lookout for obstructions during initial climb. Factors which contributed to the accident were the pilot's inadequate preflight inspection, and his decision to fly with an inadequately cleaned bubble which partially obstructed his vision. Sun glare was an additional factor in the accident.

Full Narrative

On February 20, 1995, at 0745 Pacific standard time, a Bell 47G- 5, N1309X, operated by North Coast Helicopter Services, Inc., collided with a wire during initial climb from near Sonoma, California. Visual meteorological conditions prevailed at the time of the flight. The helicopter was substantially damaged, and the commercial pilot was seriously injured. The flight was originating at the time of the accident. On February 23, 1995, the pilot's wife reported to the National Transportation Safety Board that, at the time of the accident, the pilot was planning to fly to a nearby field where loaders were standing by to place chemicals in the helicopter for a planned agricultural spray flight. The field was an estimated 1/4 mile away. In the pilot's completed "Aircraft Accident Report," NTSB Form 6120.1, he made a statement regarding the sequence of events prior to and during the flight, summarized as follows: "I got the helicopter ready to fly (untied the blades and skids, performed a preflight, checked oil, etc.). By then my crew had departed with the truck and went to the loading site, so I did not have towels to wipe the dew off the bubble. I did the best I could with my hands which still left quite a lot of droplets on the plastic. The sun was in front of me which made the visibility more restricted. I thought I could see well enough to make the short flight to the rig. Because there was a small crowd of people on my left side, I took off to my right away from the people and hit phone wires about 100 feet from the trailer. I never saw the wires because of the moisture on the bubble."

Flight

Event TypeAccident
Event Time07:45 PST
Nearest Airport0nm
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBell 47G-5
Tail NumberN1309X
Aircraft CategoryHeli
DamageSubstantial
OperatorNorth Coast Helicopter Service
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · VO-435-B1A · Reciprocating · 265
Seats3

People & Injuries

Injury Summary1 injury (1 serious injury)
Fatal0
Serious1
Minor0
Uninjured0
Total1
Crew 1Age 55 · Second Class

Conditions

ConditionsVMC
LightDaylight
WindCalm
Visibility20 sm
CeilingBroken clouds 20000 ft
Temperature / Dew Point57 / 0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data