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NTSB Report
January 3, 1989 · Cessna 207A · N7329U
Russian Mission, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
January 3, 1989
Injury Outcomes
No injuries (2 uninjured)
Location
Russian Mission, AK
Aircraft
Cessna 207A
Tail Number
N7329U
Operator
Ryan Air
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC89LA031
THE COMMERCIAL AIR TAXI PILOT AND HIS PASSENGER WERE UNINJURED FOLLOWING A FORCED LANDING. THE PILOT SAID THAT HE HAD FLOWN OVER HIS INTENDED LANDING SITE AT RUSSIAN MISSION, AK., TO INSPECT THE RUNWAY. ON THE DOWNWIND LEG, THE ENGINE OF CESSNA 207 LOST MOST OF ITS POWER. HE WAS UNABLE TO RESTORE SUFFICIENT POWER TO REMAIN AIRBORNE AND ELECTED TO LAND ON THE NEARBY, FROZEN, YUKON RIVER. HE SAID THAT HE MISJUDGED HIS ALTITUDE DURING THE LANDING APPROACH DUE TO THE FEATURELESS, ALL WHITE SURFACE OF THE RIVER, AND STRUCK THE SURFACE WHILE STILL IN A SLIGHT RIGHT TURN. INSPECTION OF THE CRASH SITE TWO DAYS AFTER THE ACCIDENT REVEALED NUMEROUS ICE CRYSTALS IN THE LEFT FUEL TANK SUMP. NO OTHER OBVIOUS ABNORMALITIES WERE NOTED. IT IS UNKNOWN IF THE ICE CRYSTALS FOUND IN THE FUEL TANK WERE CONTRIBUTORY TO THE ACCIDENT DUE TO THE LENGTH OF TIME BETWEEN THE SAMPLE AND THE ACCIDENT.
NTSB Probable Cause
THE PARTIAL ENGINE POWER LOSS DUE TO UNDETERMINED REASONS. CONTRIBUTING TO THE ACCIDENT WAS THE PILOT'S IMPROPER INFLIGHT PLANNING BY FLYING AT A TRAFFIC PATTERN ALTITUDE INSUFFICIENT TO INSURE A SAFE EMERGENCY LANDING EITHER ON OR OFF THE AIRPORT AND HIS MISJUDGEMENT OF CLEARANCE ABOVE THE FROZEN RIVER.
Full Narrative
THE COMMERCIAL AIR TAXI PILOT AND HIS PASSENGER WERE UNINJURED FOLLOWING A FORCED LANDING. THE PILOT SAID THAT HE HAD FLOWN OVER HIS INTENDED LANDING SITE AT RUSSIAN MISSION, AK., TO INSPECT THE RUNWAY. ON THE DOWNWIND LEG, THE ENGINE OF CESSNA 207 LOST MOST OF ITS POWER. HE WAS UNABLE TO RESTORE SUFFICIENT POWER TO REMAIN AIRBORNE AND ELECTED TO LAND ON THE NEARBY, FROZEN, YUKON RIVER. HE SAID THAT HE MISJUDGED HIS ALTITUDE DURING THE LANDING APPROACH DUE TO THE FEATURELESS, ALL WHITE SURFACE OF THE RIVER, AND STRUCK THE SURFACE WHILE STILL IN A SLIGHT RIGHT TURN. INSPECTION OF THE CRASH SITE TWO DAYS AFTER THE ACCIDENT REVEALED NUMEROUS ICE CRYSTALS IN THE LEFT FUEL TANK SUMP. NO OTHER OBVIOUS ABNORMALITIES WERE NOTED. IT IS UNKNOWN IF THE ICE CRYSTALS FOUND IN THE FUEL TANK WERE CONTRIBUTORY TO THE ACCIDENT DUE TO THE LENGTH OF TIME BETWEEN THE SAMPLE AND THE ACCIDENT.
Flight
Event TypeAccident
Event Time10:40 AKST
Nearest Airport0nm N
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 207A
Tail NumberN7329U
Aircraft CategoryAir
DamageSubstantial
OperatorRyan Air
Operating RulePart 135
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-520 · Reciprocating · 300
Seats7
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 33 · First Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility3 sm
CeilingOvercast 700 ft
Temperature / Dew Point28 C / 0 C
Altimeter0
Weather SourcePILO