ANC84FA073

NTSB accident investigation · Piper PA-18-150 · Platinum, AK · May 21, 1984

Accident · FatalField investigationFinal report
Date
May 21, 1984, 15:59 local (23:59 UTC)
Place
Platinum, AK
Injuries
2 fatal
Phase of flight
Maneuvering
Aircraft
N82454Piper PA-18-150N4798UCessna 180H
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Case key
4206

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

On this page

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.

Midair collisionManeuvering
Judgment - poorPilot in commandFactor
Self-induced pressurePilot in commandFactor
Judgment - poorPilot of other aircraftFactor
Self-induced pressurePilot of other aircraftFactor
Crew/group coordination - inadequateOther personFactor
Radio communications - inadequateFactor
Weather condition - low ceilingFactor
Visual lookout - inadequatePilot in commandCause
Diverted attentionPilot in commandCause
Visual lookout - inadequatePilot of other aircraftCause
Diverted attentionPilot of other aircraftCause
In flight collision with terrain/waterDescent - uncontrolled
Midair collisionManeuvering
Judgment - poorPilot in commandFactor
Self-induced pressurePilot in commandFactor
Judgment - poorPilot of other aircraftFactor
Self-induced pressurePilot of other aircraftFactor
Crew/group coordination - inadequateOther personFactor
Radio communications - inadequateFactor
Weather condition - low ceilingFactor
Visual lookout - inadequatePilot in commandCause
Diverted attentionPilot in commandCause
Visual lookout - inadequatePilot of other aircraftCause
Diverted attentionPilot of other aircraftCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The herring season was to open at 1600 hrs. According to witnesses, about 30 acft were circling in left turns over merging schools of herring while the plts & their respective boat crews were awaiting the opening signal. The acft were circling under a low overcast where the herring were merging near a shoreline. Two acft (a Piper PA-18, N82454, & a Cessna 182H, N4798U) collided while the plts were spotting fish. Of 6 witnesses who saw the collision, 5 agreed that the Cessna was converging from inside the radius of the Piper's turn. After colliding, both acft impacted on a bluff near the shoreline. Witnesses used such terms as 'frantic', 'chaotic' & 'insane' when they described the flt activity over the fish at the opening of the herring season with its lucrative rewards.

The herring season was to open at 1600 hrs. According to witnesses, about 30 acft were circling in left turns over merging schools of herring while the plts & their respective boat crews were awaiting the opening signals. The acft were circling under a low overcast where the herring were merging near a shoreline. Two acft (a Piper PA-18, N82554, & a Cessna 182H, N4798U) collided while the plts were spotting fish. Of 6 witnesses who saw the collision 5 agreed that the Cessna was converging from inside the radius of the Piper's turn. After colliding, both acft impacted on a bluff near the shoreline. Witnesses used such terms as 'frantic', 'chaotic' & 'insane' when they described the flt activity over the fish at the opening of the herring season with its lucrative rewards.

Aircraft · 2

Registration
N82454
Reported as
Piper PA-18-150
Category
Airplane
Serial number
7809140
Airframe hours
806
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Destroyed
Flight
Other work use · Part 91
Operator
Walter Arnold Hansen
Registered owner
Walter Arnold Hanson
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 15, 1984 · 84 hours before
Departed
Asigyugpak Bay, AK

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.

Registration
N4798U
Reported as
Cessna 180H
Category
Airplane
Serial number
18051498
Airframe hours
7,588
Engine
Continental O-470-R, 230 horsepower, reciprocating
Damage
Destroyed
Flight
Other work use · Part 91
Operator
Gregory Stephen Curley
Registered owner
Gregory S. Curley
Airworthiness certificate
Standard, Normal
Departed
Aspigyugpak Spi, AK

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N82454
Age
52
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Medical
Class 2, Unknown
Seat
Front
Toxicology
Performed
Flight hours
4,348 total · 98 in the last 90 days · 1 in the last 24 hours
Role
Pilot, aircraft N4798U
Age
33
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
4,329 total · 4,230 as pilot in command · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 5 knots
Visibility
12 statute miles
Lowest ceiling
500 ft overcast
Temperature
48 °F

FAA reports on this event · 2

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

Other investigations on N82454 · 1

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