ANC91LA066

NTSB accident investigation · Cessna 207A · Eek, AK · June 6, 1991

Accident · No injuriesLimited investigationFinal report
Date
June 5, 1991, 16:33 local (Jun 6, 1991, 00:33 UTC)
Place
Eek, AK
Injuries
6 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N6255HCessna 207A
Weather
Visual (VMC) · Day
Status
Completed · report January 22, 1993
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19910605020119A
Case key
5551

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

Was fuel contamination. Contributing factors are the engine vibrations and the rough vegetation upon which the airplane landed.

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(partial) - nonmechanicalCruise
Fuel injection control/system - waterCause
Forced landingDescent - emergency
Engine assembly - vibrationCause
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - tundraFactor

Analysis

The pilot-in-command stated that the fuel flow began to fluctuate and the engine began to run rough. He switched fuel tanks and the engine smoothed out. He then switched back to the original fuel tank and he stated the engine oil pressure went to zero and the engine began to vibrate. He elected to shut down the engine and execute a forced landing. Subsequent examination revealed that the engine oil pump was working, that there was a sufficient oil quantity in the engine and that there was water in the fule injector distributor.

Aircraft

Registration
N6255H
Reported as
Cessna 207A
Category
Airplane
Serial number
20700452
Airframe hours
6,463
Engine
Continental IO-520-F, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Operator
Kusko Aviation, Inc.
Registered owner
Kusko Aviation, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 15, 1991 · 78 hours before
Departed
BET · Bethel, AK
Destination
KWN · Quinhagak, AK
Flight plan
Company VFR
Airport
EEK · Eek

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
47
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
1,679 total · 32 in this make and model · 1,609 as pilot in command · 79 in the last 90 days · 44 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
30 statute miles
Lowest ceiling
None
Temperature
55 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N6255H · 2

Matched to the same aircraft by N-number and date.