SEA89LA032

NTSB accident investigation · Cessna 185F · Juneau, AK · January 10, 1989

Accident · No injuriesLimited investigationFinal report
Date
January 10, 1989, 15:30 local (19:30 UTC)
Place
Juneau, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N6420ECessna 185F
Weather
Visual (VMC) · Day
Status
Completed · report September 28, 1990
Report
Approved by Office Director
FAA report
19890110003849A
Case key
40968

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

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Probable cause

The NTSB’s determination of the probable cause, and any contributing factors.

The misjudgement of the runway conditions on the part of the pilot prior to landing. Contributing to the accident were deep snow on the runway, box canyon configuration of the area precluding runway overflight, marginal weather/light conditions for assessing the runway status and failure on the part of company dispatch personnel to acquire and provide the pilot with the runway conditions before diverting the flight to the location of the mishap.

Analysis

FAR 135 flt was diverted to remote strip to pick up additional passengers. The dispatcher was not aware that the runway was covered by 4 ft of snow until the acft was beyond radio range. The plt assumed that the rwy had been plowed as it was in previous winters. The box canyon condition of the surrounding terrain precluded the plt from over flying the rwy to check its condition. On approach the rwy appeared to be a normal snow packed surface. The plt landed the amphib float acft with the landing gear down and the airplane nosed over during the landing.

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.

Nose overLanding
Terrain condition - snow coveredFactor
In-flight planning/decision - information insufficient
Unsuitable terrain or takeoff/landing/taxi area - selectedDispatcherCause
Weather condition - snowFactor
Flt with inadqt en route/destn facilities - dispatchedDispatcherFactor
Terrain condition - blind/box canyonFactor

Aircraft

Registration
N6420E
Reported as
Cessna 185F
Category
Airplane
Serial number
18504041
Airframe hours
3,820
Engine
Continental IO-520-D, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Channel Flying, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · November 29, 1988 · 60 hours before
Departed
KAE · Kake, AK
Flight plan
VFR
Airport
Snettisham, runway 36, 2,500 × 100 ft, gravel

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
38
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
4,400 total · 300 in this make and model · 4,250 as pilot in command · 85 in the last 90 days · 35 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
135° at 20 knots, gusting 25
Visibility
2 statute miles
Lowest ceiling
1,500 ft overcast
Temperature
30 °F, dew point -0 °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 N6420E · 1

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