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NTSB Report
January 6, 1991 · Cessna 172N · N737FJ
Ukiah, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
January 6, 1991
Injury Outcomes
No injuries (4 uninjured)
Location
Ukiah, CA
Aircraft
Cessna 172N
Tail Number
N737FJ
Operator
Arthur C Hunter
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX91LA068
THE PILOT SAID HE WAS FLYING DOWN A RIVER VALLEY AT ABOUT 800 FT AGL AS HE AND HIS PASSENGERS WERE LOOKING OVER POTENTIAL TIMBER CUTTING AREAS. THE FLIGHT CROSSED A SADDLE IN THE MOUNTAINS WHICH REDUCED THE GROUND CLEARANCE TO ABOUT 300 FT. SUDDENLY, HE SAW AN UNMARKED HIGH TENSION POWER LINE DIRECTLY AHEAD. HE INITIATED A DIVING LEFT TURN IN AN ATTEMPT TO AVOID THE WIRE; HOWEVER, THE OUTBOARD RIGHT WING STRUCK THE WIRE. THE PILOT SAID THE OUTBOARD RIGHT WING SUSTAINED A SIGNIFICANT AMOUNT OF DAMAGE AND CONTROL OF THE AIRCRAFT WAS DIFFICULT IN THE ROLL AXIS. THE PILOT FLEW THE AIRCRAFT TO UKAIH, WHERE A SUCCESSFUL LANDING WAS MADE. ACCORDING TO THE PILOT, THE POWER LINE CROSSED PERPENDICULAR TO THE VALLEY WITH THE LINE SUSPENDED FROM TOWERS ON TOP OF RIDGES ON OPPOSITE SIDES OF THE VALLEY.
NTSB Probable Cause
THE FAILURE OF THE PILOT TO MAINTAIN AN ADEQUATE CLEARANCE FROM GROUND OBSTRUCTIONS. A FACTOR IN THE ACCIDENT WAS: FAILURE OF THE PILOT TO MAINTAIN AN ALTITUDE SUFFICIENT TO CLEAR ALL OBSTRUCTIONS ALONG HIS ROUTE OF FLIGHT.
Full Narrative
THE PILOT SAID HE WAS FLYING DOWN A RIVER VALLEY AT ABOUT 800 FT AGL AS HE AND HIS PASSENGERS WERE LOOKING OVER POTENTIAL TIMBER CUTTING AREAS. THE FLIGHT CROSSED A SADDLE IN THE MOUNTAINS WHICH REDUCED THE GROUND CLEARANCE TO ABOUT 300 FT. SUDDENLY, HE SAW AN UNMARKED HIGH TENSION POWER LINE DIRECTLY AHEAD. HE INITIATED A DIVING LEFT TURN IN AN ATTEMPT TO AVOID THE WIRE; HOWEVER, THE OUTBOARD RIGHT WING STRUCK THE WIRE. THE PILOT SAID THE OUTBOARD RIGHT WING SUSTAINED A SIGNIFICANT AMOUNT OF DAMAGE AND CONTROL OF THE AIRCRAFT WAS DIFFICULT IN THE ROLL AXIS. THE PILOT FLEW THE AIRCRAFT TO UKAIH, WHERE A SUCCESSFUL LANDING WAS MADE. ACCORDING TO THE PILOT, THE POWER LINE CROSSED PERPENDICULAR TO THE VALLEY WITH THE LINE SUSPENDED FROM TOWERS ON TOP OF RIDGES ON OPPOSITE SIDES OF THE VALLEY.
Flight
Event TypeAccident
Event Time10:30 PST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 172N
Tail NumberN737FJ
Aircraft CategoryAir
DamageSubstantial
OperatorArthur C Hunter
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-HZAD · Reciprocating · 150
Seats4
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 44 · Third Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility30 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO